Special Purpose Examination (SPEX) — Questions and Answers

Question 1: On a gadolinium-enhanced brain MRI, a 45-year-old with HIV (CD4 count 40 cells/µL) has a ring-enhancing lesion in the right basal ganglia with surrounding edema. MR spectroscopy shows an elevated lipid/lactate peak with markedly reduced NAA and choline. Thallium-201 SPECT is negative. Which diagnosis does this constellation MOST favor?

Tuberculoma
Primary CNS lymphoma
Toxoplasma encephalitis (Correct answer)
Progressive multifocal leukoencephalopathy (PML)

Correct answer: Toxoplasma encephalitis

In an HIV patient with CD4 < 50, a ring-enhancing basal ganglia lesion is classically either toxoplasmosis or primary CNS lymphoma (PCNSL). The key discriminator here is Thallium-201 SPECT: PCNSL is Thallium-avid (positive scan) due to its high metabolic activity, while toxoplasmosis is Thallium-negative. The MRS pattern with elevated lipid/lactate and reduced NAA and choline also favors an infectious/necrotic process (toxoplasmosis) over lymphoma, which typically shows elevated choline. Tuberculoma can ring-enhance but is less common at this CD4 level, and PML does not typically enhance or produce ring-enhancing lesions.

Question 2: A 24-year-old presents with secondary amenorrhea, galactorrhea, and headaches. Serum prolactin is 180 ng/mL. What is the most likely diagnosis?

Prolactinoma (Correct answer)
Polycystic ovary syndrome
Sheehan syndrome
Hypothyroidism

Correct answer: Prolactinoma

Markedly elevated prolactin with galactorrhea, amenorrhea, and headaches (from mass effect) is classic for a prolactin-secreting pituitary adenoma (prolactinoma).

Question 3: Which antibiotic class inhibits bacterial cell wall synthesis by binding penicillin-binding proteins?

Fluoroquinolones
Aminoglycosides
Macrolides
Beta-lactams (Correct answer)

Correct answer: Beta-lactams

Beta-lactam antibiotics bind penicillin-binding proteins (PBPs), inhibiting transpeptidation and bacterial cell wall synthesis.

Question 4: Which measure best quantifies the public health impact of eliminating a risk factor from a population?

Number needed to treat
Relative risk
Odds ratio
Population attributable risk percent (Correct answer)

Correct answer: Population attributable risk percent

Population attributable risk percent estimates the proportion of disease in the total population attributable to a given exposure.

Question 5: A 7-year-old boy is brought in for enuresis. He has been dry during the day since age 3 but has never achieved consistent nighttime dryness. He has no dysuria, normal urinalysis, and no daytime urgency. His father reports he also wet the bed until age 10. Which statement BEST characterizes the appropriate management?

Reassure that primary monosymptomatic nocturnal enuresis is developmental; motivational therapy and enuresis alarm are first-line (Correct answer)
Start desmopressin immediately as first-line pharmacotherapy given the family history
Initiate anticholinergic therapy targeting presumed detrusor overactivity
Order a voiding cystourethrogram to rule out posterior urethral valves before any behavioral intervention

Correct answer: Reassure that primary monosymptomatic nocturnal enuresis is developmental; motivational therapy and enuresis alarm are first-line

This is primary monosymptomatic nocturnal enuresis (PMNE) — never dry at night, no daytime symptoms, normal UA. It has a strong genetic basis (autosomal dominant tendency). Management starts with reassurance, elimination of bladder irritants, and behavioral strategies. The enuresis alarm has the highest long-term cure rate. Desmopressin is useful for short-term situations (sleepovers) but not first-line for long-term resolution. Anticholinergics are for daytime urgency/incontinence, not PMNE. VCUG is not indicated without daytime symptoms or UTIs.

Question 6: A 70-year-old man develops sudden inability to speak but can understand language perfectly. Which aphasia does he have?

Wernicke aphasia
Global aphasia
Conduction aphasia
Broca aphasia (Correct answer)

Correct answer: Broca aphasia

Broca aphasia is a non-fluent aphasia with intact comprehension, caused by lesions in the left inferior frontal gyrus.

Question 7: Which cranial nerve is responsible for the corneal reflex (afferent limb)?

CN VII
CN V (ophthalmic branch) (Correct answer)
CN III
CN IV

Correct answer: CN V (ophthalmic branch)

The afferent limb of the corneal reflex is carried by the ophthalmic branch (V1) of the trigeminal nerve (CN V); the efferent limb is CN VII.

Question 8: Which physical exam finding is MOST specific for cardiac tamponade?

Hypotension
Jugular venous distension
Pulsus paradoxus >10 mmHg (Correct answer)
Muffled heart sounds

Correct answer: Pulsus paradoxus >10 mmHg

Pulsus paradoxus greater than 10 mmHg is the most specific physical exam finding for cardiac tamponade, reflecting impaired ventricular filling with inspiration.

Question 9: A 55-year-old man with a long smoking history presents with hyponatremia (Na 122 mEq/L), concentrated urine, and a pulmonary mass on chest X-ray. What is the underlying mechanism of his hyponatremia?

Adrenal insufficiency
Cerebral salt wasting
Hypothyroidism-induced hyponatremia
Syndrome of inappropriate ADH secretion (SIADH) (Correct answer)

Correct answer: Syndrome of inappropriate ADH secretion (SIADH)

Small cell lung carcinoma is the most common malignancy associated with SIADH, which causes euvolemic hyponatremia with concentrated urine.

Question 10: Which imaging modality is preferred for evaluating suspected acute ischemic stroke?

PET scan
CT with contrast
Non-contrast CT of the head (Correct answer)
MRI with gadolinium

Correct answer: Non-contrast CT of the head

Non-contrast CT is the first-line study to rule out hemorrhage before thrombolytic therapy in acute stroke.

Question 11: What is the recommended management for a pregnant patient diagnosed with primary genital herpes at 36 weeks gestation?

Expectant management without treatment
Induction of labor at 37 weeks
Acyclovir suppressive therapy until delivery (Correct answer)
Immediate cesarean delivery

Correct answer: Acyclovir suppressive therapy until delivery

Acyclovir suppressive therapy from 36 weeks reduces viral shedding and the risk of recurrent outbreak at delivery, decreasing the need for cesarean section.

Question 12: During interpretation of a Tc-99m sestamibi myocardial perfusion SPECT study with pharmacologic stress (adenosine), a patient demonstrates a fixed perfusion defect in the inferior wall. The post-processing attenuation correction (AC) images show near-normalization of this defect. Which statement BEST characterizes the appropriate next step and the imaging pitfall encountered?

The AC images resolve the diagnostic dilemma; the finding represents diaphragmatic attenuation artifact on non-AC images, and the study is effectively normal for perfusion
Repeat the study with Tl-201 redistribution imaging to distinguish scar from attenuation, as sestamibi cannot assess viability
Prone imaging should be performed to confirm that the inferior defect on non-AC images is attenuation artifact before concluding the study is normal (Correct answer)
The non-AC images are considered definitive; the AC images overcorrect for diaphragmatic attenuation and the defect represents true inferior MI — no further workup needed

Correct answer: Prone imaging should be performed to confirm that the inferior defect on non-AC images is attenuation artifact before concluding the study is normal

A fixed inferior wall defect that normalizes on attenuation-corrected (AC) images is a classic presentation of diaphragmatic attenuation artifact, but AC algorithms themselves can introduce artifacts if registration between CT (used for AC) and SPECT is imperfect. The recommended confirmatory step is prone imaging: repositioning the patient prone shifts the diaphragm, and if the inferior defect disappears or markedly diminishes on prone images, attenuation artifact is confirmed. This avoids false-positive diagnoses of inferior MI and unnecessary catheterization. Accepting AC normalization alone without confirmation is insufficient. Tl-201 redistribution is used for viability assessment but is not the first-line response to this specific diagnostic ambiguity.

Question 13: A 72-year-old woman is admitted with altered mental status, hypernatremia (Na 168 mEq/L), and polyuria (8 L/day). She has no history of diabetes mellitus. Serum glucose is 92 mg/dL. After 8 hours of IV hypotonic fluids, urine remains dilute (osmolality 110 mOsm/kg) despite serum osmolality of 348 mOsm/kg. Desmopressin 10 mcg intranasally is given, and 2 hours later urine osmolality rises to 680 mOsm/kg. What does this response MOST indicate?

Primary polydipsia
Osmotic diuresis from undetected glycosuria
Central diabetes insipidus (Correct answer)
Nephrogenic diabetes insipidus

Correct answer: Central diabetes insipidus

The water deprivation test (or in this case, the desmopressin challenge during established hypernatremic dehydration) differentiates the causes of diabetes insipidus. A >50% rise in urine osmolality after exogenous desmopressin indicates an intact renal tubular response to ADH — meaning the kidney CAN concentrate urine when given ADH, confirming the problem is ADH deficiency (central DI). In nephrogenic DI, urine osmolality would fail to rise adequately despite desmopressin because the renal tubules are unresponsive to ADH. Primary polydipsia is excluded by the hypernatremia and persistent dilute urine during fluid restriction. Osmotic diuresis from glycosuria is excluded by the normal serum glucose.

Question 14: A 58-year-old woman with type 2 diabetes, hypertension, and CKD stage 3b (eGFR 32 mL/min/1.73m²) presents for medication review. Her HbA1c is 8.9%. Which antidiabetic agent adjustment is most appropriate?

Reduce metformin dose to 500 mg twice daily and add a GLP-1 receptor agonist (Correct answer)
Continue metformin at full dose and add empagliflozin
Discontinue metformin and initiate insulin glargine
Add sitagliptin 100 mg daily without adjusting metformin

Correct answer: Reduce metformin dose to 500 mg twice daily and add a GLP-1 receptor agonist

Metformin can be continued with dose reduction at eGFR 30–45 mL/min/1.73m² (reduce to maximum 1000 mg/day); it is contraindicated below eGFR 30. SGLT-2 inhibitors (empagliflozin) lose glycemic efficacy and are generally not recommended below eGFR 45. Sitagliptin requires dose adjustment to 50 mg daily at eGFR 30–50. GLP-1 receptor agonists require no renal dose adjustment and provide cardiovascular and renoprotective benefits, making the combination appropriate here.

Question 15: Which immunofluorescence pattern is characteristic of pemphigus vulgaris?

Intercellular IgG in a 'fishnet' pattern (Correct answer)
Granular IgA at dermal papillae tips
Linear IgG at the dermal-epidermal junction
C3 deposits at the basement membrane zone

Correct answer: Intercellular IgG in a 'fishnet' pattern

Pemphigus vulgaris shows intercellular IgG deposition in a 'fishnet' or 'chicken wire' pattern on direct immunofluorescence due to anti-desmoglein antibodies.

Question 16: A patient with a GFR of 28 mL/min requires contrast-enhanced CT. Which strategy best minimizes the risk of contrast-induced nephropathy?

Use double the standard contrast volume to ensure diagnostic quality
Prehydrate with IV normal saline and use the lowest effective iodine dose (Correct answer)
Withhold metformin for 24 hours but give standard contrast dose without hydration
Administer furosemide immediately after contrast injection

Correct answer: Prehydrate with IV normal saline and use the lowest effective iodine dose

IV hydration with isotonic saline before and after contrast administration and minimizing contrast volume are the cornerstones of CIN prevention in patients with reduced GFR.

Question 17: Which antibiotic class is associated with QT interval prolongation and is used with caution in patients on antiarrhythmic drugs?

Fluoroquinolones
Penicillins
Macrolides — specifically azithromycin (Correct answer)
Tetracyclines

Correct answer: Macrolides — specifically azithromycin

Macrolides, particularly azithromycin, are associated with QT prolongation and risk of torsades de pointes, especially combined with antiarrhythmics.

Question 18: Which of the following is consistent with bulimia nervosa but NOT with anorexia nervosa, binge-purge type?

Binge eating episodes
Body weight within or above normal range (Correct answer)
Distorted body image
Compensatory purging behavior

Correct answer: Body weight within or above normal range

By definition, bulimia nervosa requires that binge-purge behavior occur in the context of a body weight NOT significantly low; anorexia nervosa binge-purge subtype occurs at low weight.

Question 19: A physician who held an unrestricted license in State A for 12 years but allowed it to lapse 7 years ago is now applying for licensure in State B. State B requires SPEX for any physician with more than 5 years of inactivity. The physician passed SPEX with a score of 76. Which statement BEST describes the likely outcome?

The physician must retake the USMLE Step 3 in addition to SPEX since the original license has lapsed more than 5 years.
The physician will be denied licensure because SPEX only applies to physicians with fewer than 5 years of inactivity.
A passing SPEX score guarantees unrestricted licensure in State B because it demonstrates current competency.
The physician meets the SPEX requirement, but the board may still impose additional conditions such as proctoring or CME requirements. (Correct answer)

Correct answer: The physician meets the SPEX requirement, but the board may still impose additional conditions such as proctoring or CME requirements.

A passing SPEX score satisfies the examination requirement but does not guarantee unrestricted licensure. State medical boards retain authority to impose additional conditions—such as supervised practice, proctoring periods, or continuing medical education requirements—based on the length of inactivity or other factors in the physician's record.

Question 20: An 80-year-old man with baseline mild cognitive impairment is hospitalized for pneumonia. On hospital day 2, his family notes acute confusion, agitation alternating with somnolence, and disorganized speech that fluctuates over the day. His baseline cognition was intact 48 hours ago. The most likely diagnosis is:

Lewy body dementia
New-onset psychosis
Delirium (Correct answer)
Rapidly progressing Alzheimer disease

Correct answer: Delirium

Delirium is defined by acute onset, fluctuating course, inattention, and disorganized thinking or altered consciousness—all present here. Pre-existing cognitive impairment is the strongest risk factor. Dementia (including Alzheimer and Lewy body) progresses over months to years, not hours. New-onset psychosis in an 80-year-old is far less likely than delirium in a medically ill patient. The key distinguishing features of delirium are acute onset and fluctuation.

Question 21: A 65-year-old with known AAA has sudden severe back pain. Which imaging study should be obtained immediately?

MRI abdomen
Plain abdominal X-ray
CT angiography of the abdomen and pelvis (Correct answer)
Abdominal ultrasound

Correct answer: CT angiography of the abdomen and pelvis

CTA provides rapid, detailed assessment of aortic aneurysm rupture or leak and guides surgical planning in hemodynamically stable patients.

Question 22: A pharmacist receives a prescription for oxycodone 80 mg tablets with no diagnosis noted. The dose seems unusually high. What is the most appropriate first step?

Refuse to fill and document the refusal in the patient file
Dispense the medication as written since the prescriber has authority
Call the state board of pharmacy immediately
Contact the prescriber to verify the prescription and clarify clinical intent (Correct answer)

Correct answer: Contact the prescriber to verify the prescription and clarify clinical intent

The pharmacist's professional responsibility includes verifying clinical appropriateness by contacting the prescriber when a prescription raises concern.

Question 23: A trainee appraiser argues that passing the SPEX should waive the supervisory appraiser requirement and allow her to complete appraisals independently while awaiting full licensure. Under AQB criteria, this argument is:

Partially valid — the SPEX waives the supervisor requirement for desktop appraisals but not for in-person inspections.
Valid, because the SPEX demonstrates sufficient educational competency to perform appraisals without supervision on non-complex residential assignments.
Valid only if the trainee's home state has enacted an AQB-compliant provisional license statute that references the SPEX.
Invalid, because the SPEX addresses education equivalency for reciprocal licensure only and has no bearing on trainee supervision requirements. (Correct answer)

Correct answer: Invalid, because the SPEX addresses education equivalency for reciprocal licensure only and has no bearing on trainee supervision requirements.

The SPEX is an examination pathway designed exclusively for reciprocal licensure — specifically to allow an appraiser already credentialed in one state to waive re-taking education hours in another state. It has no applicability to trainee supervision requirements, which are governed by separate AQB experience criteria and state regulations. A trainee cannot use the SPEX to circumvent the supervised experience requirement.

Question 24: A 4-year-old presents with periorbital edema worse in the morning, frothy urine, and no hematuria. Urinalysis shows 4+ protein. What is the best initial treatment?

Dietary sodium restriction alone
Oral prednisone (Correct answer)
Cyclophosphamide
ACE inhibitor

Correct answer: Oral prednisone

First-line treatment for childhood nephrotic syndrome (minimal change disease) is oral corticosteroids, typically prednisone.

Question 25: A patient presents with ptosis, miosis, and anhidrosis on the right side of the face. Which syndrome does this represent?

Horner syndrome (Correct answer)
Claude syndrome
Weber syndrome
Wallenberg syndrome

Correct answer: Horner syndrome

Horner syndrome consists of ptosis, miosis, and anhidrosis caused by interruption of the sympathetic pathway.

Question 26: Which dermatome corresponds to the area over the nipple line?

T2
T4 (Correct answer)
T6
T8

Correct answer: T4

T4 supplies the nipple line and is a classic landmark for dermatome mapping.

Question 27: Which controlled substance schedule includes drugs with accepted medical use but the highest abuse potential?

Schedule IV
Schedule II (Correct answer)
Schedule I
Schedule III

Correct answer: Schedule II

Schedule II drugs have accepted medical use but carry the highest abuse potential among approved medications.

Question 28: A 34-year-old woman with relapsing-remitting MS is started on natalizumab. After 24 months of therapy, JC virus antibody index rises to 3.2. She then develops rapidly progressive cognitive decline and focal deficits. CSF PCR is positive for JC virus at 450 copies/mL. What paradoxical worsening phenomenon must be anticipated when natalizumab is discontinued?

Progressive multifocal leukoencephalopathy extension due to viral latency shift
Rebound MS relapse due to lymphocyte trafficking resumption
Immune reconstitution inflammatory syndrome (IRIS) (Correct answer)
Gadolinium-enhancing lesion eruption from T-cell re-activation

Correct answer: Immune reconstitution inflammatory syndrome (IRIS)

When natalizumab is stopped in the setting of PML, reentry of sequestered lymphocytes into the CNS triggers immune reconstitution inflammatory syndrome (IRIS). This causes an inflammatory flare around PML lesions that can be more acutely devastating than the underlying PML itself. Clinicians must balance accelerating natalizumab washout (plasmapheresis) against the severity of IRIS, sometimes requiring corticosteroids to blunt the inflammatory surge.

Question 29: A physician treating a patient discovers that a colleague is impaired by substance abuse and is practicing unsafely. What is the physician's obligation?

Report the colleague to the appropriate medical board or hospital authority (Correct answer)
Cover for the colleague until they seek help voluntarily
Speak privately to the colleague and take no further action
Inform only the hospital administrator, not external authorities

Correct answer: Report the colleague to the appropriate medical board or hospital authority

Physicians have a professional and ethical obligation to report an impaired colleague to protect patient safety, even if it involves reporting to licensing boards.

Question 30: A 28-year-old male veteran presents with nightmares, hypervigilance, and emotional numbing 14 months after a combat deployment. He has failed two adequate SSRI trials. He now reports passive suicidal ideation without plan or intent. Which pharmacologic agent has the STRONGEST evidence as an augmentation strategy specifically targeting PTSD nightmares?

Quetiapine
Nabilone
Prazosin (Correct answer)
Topiramate

Correct answer: Prazosin

Prazosin, an alpha-1 adrenergic antagonist, has the most robust randomized controlled trial evidence specifically for PTSD-related nightmares and sleep disturbance. It reduces noradrenergic activity during REM sleep. Quetiapine has limited evidence as augmentation. Topiramate has some data but is not FDA-indicated and evidence is mixed. Nabilone (a cannabinoid) has preliminary data in treatment-resistant PTSD nightmares but far less evidence than prazosin.

Question 31: A 29-year-old G2P1 at 22 weeks gestation undergoes amniocentesis for elevated AFP on quad screen. The amniotic fluid AFP is markedly elevated and acetylcholinesterase is present. Fetal ultrasound reveals a normal-appearing fetus with no visible neural tube defect. What is the most likely explanation?

Fetal sacrococcygeal teratoma (Correct answer)
Placental mesenchymal dysplasia
Contamination of amniotic fluid with fetal blood
Confined placental mosaicism

Correct answer: Fetal sacrococcygeal teratoma

The combination of elevated amniotic fluid AFP AND positive acetylcholinesterase (AChE) confirms fetal origin rather than contamination. AChE is present in fetal neural tissue and exposed skin/gut. When the neural tube appears intact on ultrasound, other open fetal defects must be considered — sacrococcygeal teratoma is a classic cause of elevated AFP with positive AChE and no visible NTD. Blood contamination would not produce AChE. Placental mesenchymal dysplasia can elevate AFP but does not produce AChE. Confined placental mosaicism does not elevate AChE.

Question 32: A state is evaluating a mandatory childhood immunization program. Program analysis shows that for every 1,000,000 doses of a vaccine administered, 1 child develops vaccine-associated encephalitis (a severe adverse event), while the vaccine prevents 500 cases of disease, 50 hospitalizations, and 5 deaths. Which ethical principle is MOST directly in tension with the mandatory nature of this program?

Autonomy (Correct answer)
Justice
Non-maleficence
Beneficence

Correct answer: Autonomy

Mandatory vaccination programs override individual choice by compelling participation regardless of personal or parental preference — directly conflicting with autonomy (the right of individuals to make informed decisions about their own medical care). While beneficence (population benefit), non-maleficence (balancing rare harms), and justice (equitable protection) are all relevant, mandating a medical intervention without consent is quintessentially an autonomy conflict, which is why exemption policies and public health ethics debates center on this tension.

Question 33: A 45-year-old patient presents with a violaceous, reticulated, net-like vascular pattern on the skin of the lower extremities that worsens in cold temperatures but does not resolve with rewarming. She has a history of systemic lupus erythematosus and antiphospholipid antibody syndrome. Which diagnosis best explains this finding?

Erythema ab igne
Livedo racemosa (Correct answer)
Livedo reticularis (physiologic)
Cutis marmorata telangiectatica congenita

Correct answer: Livedo racemosa

Livedo racemosa is a fixed, irregular, broken-net pattern that does NOT resolve with rewarming, distinguishing it from physiologic livedo reticularis. It is strongly associated with antiphospholipid antibody syndrome and systemic vasculitis. Erythema ab igne results from chronic heat exposure and shows a similar pattern but with hyperpigmentation. Cutis marmorata telangiectatica congenita is a congenital condition presenting at birth.

Question 34: A physician identifies a 55-year-old patient with a 10-year ASCVD risk of 9.8% using the Pooled Cohort Equations. According to current ACC/AHA guidelines, which of the following best characterizes the recommended approach for statin therapy in this patient?

Initiate high-intensity statin therapy without further discussion
Recommend low-intensity statin only, as the 10% threshold mandates the lowest effective dose
Engage in a clinician-patient risk discussion; a risk-enhancing factor or coronary artery calcium (CAC) score may help inform the decision (Correct answer)
Withhold statin therapy because the patient falls below the 10% threshold requiring treatment

Correct answer: Engage in a clinician-patient risk discussion; a risk-enhancing factor or coronary artery calcium (CAC) score may help inform the decision

The ACC/AHA 2018 cholesterol guidelines define the 7.5–10% 10-year ASCVD risk range as a 'borderline' risk zone where the decision to initiate statin therapy should involve a risk discussion. Risk-enhancing factors (e.g., hs-CRP ≥2, ABI <0.9, LDL-C ≥160) or a CAC score (CAC = 0 favors withholding; CAC ≥100 favors initiating) are recommended to resolve borderline-risk patients — not automatic treatment or withholding.

Question 35: A 52-year-old postmenopausal woman presents with a 3 cm unilateral adnexal mass. CA-125 is 28 U/mL (normal). Transvaginal ultrasound shows a unilocular, thin-walled cyst with no internal septations, papillations, or solid components. She has no family history of ovarian or breast cancer. What is the most evidence-based management?

Repeat ultrasound in 6 weeks to assess for interval change
Annual ultrasound surveillance without intervention (Correct answer)
Surgical excision via laparoscopy given postmenopausal status
MRI pelvis with contrast to further characterize the lesion

Correct answer: Annual ultrasound surveillance without intervention

According to ACOG/SGO guidelines, simple unilocular adnexal cysts ≤10 cm in postmenopausal women with normal CA-125 have a very low malignancy risk (<1%). Annual surveillance ultrasound is the appropriate management — surgical excision is not routinely required. This represents a shift from older teaching that all postmenopausal adnexal masses required surgery. Repeat ultrasound in 6 weeks is too soon without a specific clinical reason. MRI adds cost without changing management for morphologically simple cysts. The absence of complex features (septations, papillations, solid areas) is the key discriminator.

Question 36: A 68-year-old man on warfarin for atrial fibrillation (INR target 2.0–3.0) starts clarithromycin for community-acquired pneumonia. His INR is checked 5 days later and is 4.9 with no bleeding. What is the most appropriate next step?

Administer vitamin K 10 mg IV immediately
Switch to apixaban to avoid future interactions
Continue warfarin unchanged; repeat INR in 1 week
Hold warfarin 1–2 doses, recheck INR in 1–2 days, resume at a lower dose (Correct answer)

Correct answer: Hold warfarin 1–2 doses, recheck INR in 1–2 days, resume at a lower dose

With a supratherapeutic INR of 4.9 and no active bleeding, the guideline-recommended approach (CHEST guidelines) is to hold 1–2 warfarin doses and recheck INR in 1–2 days, then resume at a reduced dose. IV vitamin K 10 mg is reserved for serious/life-threatening bleeding or INR >10. Switching to a DOAC is a separate clinical decision not warranted urgently here. Continuing unchanged risks bleeding as clarithromycin inhibits CYP3A4 and P-glycoprotein, amplifying warfarin's effect.

Question 37: A 55-year-old man with hypertension and gout presents with a serum uric acid of 9.8 mg/dL and his third gout flare this year. Which antihypertensive agent would be MOST beneficial to add given his history?

Amlodipine
Hydrochlorothiazide
Losartan (Correct answer)
Metoprolol

Correct answer: Losartan

Losartan (an ARB) has uricosuric properties that lower serum uric acid, making it a preferred antihypertensive in patients with gout.

Question 38: What is the first-line treatment for mild to moderate atopic dermatitis in adults?

Phototherapy
Systemic corticosteroids
Topical corticosteroids (Correct answer)
Oral antihistamines

Correct answer: Topical corticosteroids

Topical corticosteroids are the first-line treatment for mild to moderate atopic dermatitis, directly reducing skin inflammation and pruritus.

Question 39: When preparing a SPEX multi-element standard for ICP-MS analysis at 1 µg/L in a 2% HNO₃ matrix, an analyst notices that the measured signal for ⁵¹V (vanadium) is approximately 30% higher than expected based on the certified concentration. The instrument's internal standard (⁴⁵Sc) shows normal recovery at 98%. Which polyatomic interference is MOST likely responsible, and what is the best instrumental correction approach?

¹⁴N³⁷Cl⁺ at m/z 51 from nitrogen and chloride in the plasma; increase cool plasma conditions to reduce nitrogen-based interferences
⁵⁰Ti¹H⁺ at m/z 51 from titanium hydride formation; apply a mathematical correction using the ⁴⁸Ti signal
³⁵Cl¹⁶O⁺ at m/z 51 from residual chloride in the nitric acid; use collision cell technology (CCT) with helium to dissociate the polyatomic ion (Correct answer)
³⁴S¹⁶O¹H⁺ at m/z 51 from sulfur-containing reagent impurities; switch to collision/reaction cell with hydrogen as the reaction gas

Correct answer: ³⁵Cl¹⁶O⁺ at m/z 51 from residual chloride in the nitric acid; use collision cell technology (CCT) with helium to dissociate the polyatomic ion

³⁵Cl¹⁶O⁺ (m/z = 35 + 16 = 51) is the most common and significant polyatomic interference on ⁵¹V in ICP-MS. Even trace chloride contamination in reagents or from the sample matrix can produce substantial ClO⁺ signal at m/z 51. The scandium internal standard at m/z 45 would not correct for this because the interference is matrix-specific rather than a global sensitivity change. The preferred solution is collision cell technology (CCT) with helium as the collision gas, which reduces polyatomic ions through kinetic energy discrimination without the reaction byproduct issues of hydrogen-based reaction gases for this specific interference. Cool plasma can reduce some interferences but is not effective for ClO⁺.

Question 40: A 29-year-old with known endometriosis has a right ovarian cyst measuring 5 cm with 'ground glass' echotexture on ultrasound. CA-125 is 45 U/mL. What is the most appropriate management?

Oral contraceptives and repeat ultrasound in 6 weeks
GnRH agonist therapy for 6 months then reassess
Immediate laparotomy
Laparoscopic cystectomy (Correct answer)

Correct answer: Laparoscopic cystectomy

An endometrioma ≥4 cm in a patient planning fertility or with symptoms should be managed with laparoscopic cystectomy, which is superior to drainage or aspiration.

Question 41: What is the value of continuing education in neurology for SPEX professionals?

It is primarily a social activity
It is only needed for recertification
It keeps professionals current with evolving standards and practices (Correct answer)
It replaces workplace experience

Correct answer: It keeps professionals current with evolving standards and practices

Continuing education ensures professionals stay current with the latest developments, standards, and best practices in their field.

Question 42: A newborn has cyanosis that improves with crying but worsens with feeding. Passing a catheter through the nose is difficult bilaterally. What is the most likely diagnosis?

Congenital heart disease
Vascular ring
Choanal atresia (Correct answer)
Pierre Robin sequence

Correct answer: Choanal atresia

Bilateral choanal atresia causes nasal airway obstruction; crying forces mouth breathing and relieves cyanosis, while feeding (nasal breathing required) worsens it.

Question 43: A 28-year-old woman presents with episodic severe unilateral headache with allodynia, ptosis, and miosis ipsilateral to the pain. Attacks last 15–180 minutes and recur up to 8 times daily in clusters. Unlike migraine, the attacks are associated with prominent ipsilateral autonomic features and extreme agitation. She reports that indomethacin provides no benefit, but high-flow 100% oxygen aborts attacks within 15 minutes. Which condition best fits, and what is the first-line preventive therapy?

Paroxysmal hemicrania; indomethacin
Hemicrania continua; indomethacin
Cluster headache; verapamil (Correct answer)
SUNCT syndrome; lamotrigine

Correct answer: Cluster headache; verapamil

Cluster headache is distinguished by attacks lasting 15–180 minutes (up to 8/day), severe unilateral periorbital pain, ipsilateral cranial autonomic features (ptosis, miosis, lacrimation, rhinorrhea), and characteristic patient agitation/restlessness. High-flow oxygen (100% at 12–15 L/min) is first-line abortive therapy. Verapamil is the gold-standard preventive agent. Paroxysmal hemicrania is exquisitely indomethacin-responsive — its absence here rules it out. SUNCT features shorter, more frequent attacks (seconds duration) and is treated with lamotrigine.

Question 44: A 34-year-old male sustains blunt abdominal trauma in a motor vehicle collision. FAST exam is positive. CT reveals a grade IV splenic laceration with active extravasation and a grade II liver laceration without active bleeding. He is hemodynamically stable with BP 108/72 after 2L crystalloid. His INR is 1.1 and hemoglobin is 9.2 g/dL. What is the most appropriate management?

Angioembolization of the splenic artery (Correct answer)
Emergent exploratory laparotomy with splenectomy
Diagnostic laparoscopy followed by laparoscopic splenectomy
Nonoperative management with ICU monitoring

Correct answer: Angioembolization of the splenic artery

In a hemodynamically stable patient with a grade IV splenic laceration and CT evidence of active arterial extravasation (vascular blush), angioembolization is the preferred management. The combination of grade IV injury plus active contrast extravasation significantly increases the failure rate of pure nonoperative management (NOM), and angioembolization has been shown to reduce this failure rate from ~50% to ~10-15% in this setting. The patient's hemodynamic response to fluid resuscitation supports a non-operative approach over emergent laparotomy. Laparoscopy is not indicated for acute splenic trauma with extravasation. Pure NOM without embolization would be inappropriate given the active blush on CT.

Question 45: A SPEX-based multi-element standard containing both arsenic and chloride is prepared in 2% HNO₃ for ICP-MS analysis. The laboratory observes an anomalously high arsenic (m/z = 75) signal. Which polyatomic interference is most responsible, and what is the correct mitigation?

³⁵Cl²⁺ at m/z 35; apply a mathematical correction using the ⁷⁷Se isotope ratio
⁴⁰Ca³⁵Cl⁺ at m/z 75; dilute the sample 1:10 to reduce chloride matrix load
³⁸Ar³⁷Cl⁺ at m/z 75; switch to a high-resolution sector-field ICP-MS instrument
⁴⁰Ar³⁵Cl⁺ at m/z 75; use a collision/reaction cell with hydrogen or helium gas to dissociate the polyatomic ion (Correct answer)

Correct answer: ⁴⁰Ar³⁵Cl⁺ at m/z 75; use a collision/reaction cell with hydrogen or helium gas to dissociate the polyatomic ion

⁴⁰Ar³⁵Cl⁺ is the dominant polyatomic interference on ⁷⁵As in ICP-MS because both argon (the plasma gas) and chloride (from the HCl matrix or chloride-containing samples) are abundant. The argon-chloride dimer forms at m/z = 40+35 = 75, directly overlapping the only stable isotope of arsenic. A collision/reaction cell (CRC) using H₂ or He effectively dissociates or retards this polyatomic ion, restoring accurate arsenic quantification. The other options describe real but secondary interferences or incorrect element combinations.

Question 46: A 52-year-old woman presents with a 2-year history of generalized pruritus, erosions, and tense bullae predominantly on her trunk and extremities. Direct immunofluorescence (DIF) of perilesional skin shows linear IgG and C3 deposition along the dermal-epidermal junction. Indirect immunofluorescence on salt-split skin shows IgG binding to the ROOF (epidermal side) of the split. Serum ELISA is positive for BP180 and BP230 antibodies. She fails to respond adequately to high-dose topical clobetasol. What is the MOST appropriate next-line systemic therapy based on current evidence?

Oral prednisone 0.5 mg/kg/day combined with doxycycline 200 mg/day (Correct answer)
Rituximab 1000 mg IV on days 1 and 15
Intravenous immunoglobulin (IVIG) at 2 g/kg per cycle monthly
Dupilumab 600 mg SC loading dose followed by 300 mg every 2 weeks

Correct answer: Oral prednisone 0.5 mg/kg/day combined with doxycycline 200 mg/day

This patient has bullous pemphigoid (BP), confirmed by tense bullae, linear IgG/C3 at the DEJ on DIF, roof-binding on salt-split skin (confirming antibodies target hemidesmosomal proteins above the lamina densa), and positive BP180/BP230 ELISA. When high-potency topical steroids fail or are insufficient, the current evidence-based first-line systemic option for BP is oral prednisone combined with doxycycline. Multiple randomized trials (including the BLISTER trial) have shown that doxycycline 200 mg/day (as monotherapy or combined with low-dose prednisolone) achieves disease control comparable to systemic steroids alone but with a superior safety profile — particularly important given BP's typical patient population (elderly with comorbidities). Rituximab and IVIG are reserved for refractory or severe cases. Dupilumab (anti-IL-4Rα) has emerging evidence for BP but is not yet established as the second-line standard of care.

Question 47: Selective COX-2 inhibitors (e.g., celecoxib) carry an increased cardiovascular risk primarily because they:

Elevate LDL cholesterol through PCSK9 upregulation
Increase platelet aggregation directly
Inhibit thromboxane A2 while sparing prostacyclin
Inhibit prostacyclin (PGI2) while sparing thromboxane A2 (TXA2) (Correct answer)

Correct answer: Inhibit prostacyclin (PGI2) while sparing thromboxane A2 (TXA2)

COX-2 is expressed in vascular endothelium and produces protective PGI2; its inhibition shifts the balance toward pro-thrombotic TXA2 activity from platelets, increasing MI and stroke risk.

Question 48: A 34-year-old woman with bipolar I disorder maintained on lithium for 3 years presents with a 6-week history of depressive episodes. Her lithium level is 0.9 mEq/L. She also reports polyuria and polydipsia. TSH is 8.2 mIU/L. Which of the following is the MOST appropriate next step?

Switch lithium to valproate and refer to endocrinology
Reduce lithium dose to target a level of 0.6 mEq/L
Add lamotrigine and monitor lithium levels monthly
Add levothyroxine and continue lithium (Correct answer)

Correct answer: Add levothyroxine and continue lithium

Lithium-induced hypothyroidism occurs in up to 40% of long-term users and can precipitate depressive breakthrough. The correct approach is to treat the hypothyroidism with levothyroxine while continuing lithium, which remains effective for bipolar I maintenance. Switching to valproate is not indicated for a therapeutic lithium level; reducing the dose risks destabilizing mood without addressing the hypothyroidism; lamotrigine addition does not address the root hormonal cause of the depression.

Question 49: A frail 82-year-old woman with heart failure, CKD stage 3, and COPD is admitted for hip fracture repair. Preoperatively, the most validated tool to predict her risk of postoperative complications and functional decline is:

APACHE II score
Glasgow Coma Scale
Comprehensive Geriatric Assessment (CGA) (Correct answer)
ASA Physical Status Classification

Correct answer: Comprehensive Geriatric Assessment (CGA)

Comprehensive Geriatric Assessment (CGA) evaluates functional status, cognition, mood, nutrition, polypharmacy, social support, and comorbidities in older adults. It is the most validated approach for predicting postoperative outcomes, identifying reversible risk factors, and guiding perioperative optimization in elderly patients. The ASA classification is a global anesthesia risk tool but does not capture geriatric-specific vulnerabilities. APACHE II is used in ICU mortality prediction. GCS measures neurological status.

Question 50: Under AQB criteria, the SPEX is designed to allow an appraiser to demonstrate equivalency to state licensing education requirements WITHOUT retaking those hours. Which of the following scenarios would STILL require the appraiser to complete additional education hours even after passing the SPEX?

The appraiser passed the SPEX but has not yet accumulated the required 1,000 hours of experience for Certified Residential credential.
The appraiser passed the SPEX more than 12 months before submitting the reciprocal application.
The appraiser passed the SPEX but their score was at the minimum passing threshold rather than significantly above it.
The appraiser passed the SPEX but the receiving state requires a state-specific law and regulation course not covered by the SPEX content. (Correct answer)

Correct answer: The appraiser passed the SPEX but the receiving state requires a state-specific law and regulation course not covered by the SPEX content.

The SPEX substitutes for the national education hour requirements but does NOT waive state-specific supplemental courses (e.g., a state law and regulations course). Many states mandate this additional coursework for all applicants, including those using the SPEX pathway. Experience hours and score levels are separate credentialing issues, not SPEX scope.

Question 51: What is the cornerstone of management for Stevens-Johnson syndrome (SJS)?

Intravenous immunoglobulin (IVIG) alone
Supportive care in a burn unit or ICU (Correct answer)
Broad-spectrum antibiotics targeting S. aureus
High-dose systemic corticosteroids

Correct answer: Supportive care in a burn unit or ICU

The cornerstone of SJS management is supportive care—fluid replacement, wound care, nutritional support, and pain management—ideally in a burn unit due to the extent of epidermal detachment.

Question 52: A 19-year-old college student is brought to the ED after being found unresponsive at a party. He is bradycardic (HR 48), bradypneic (RR 8), and has pinpoint pupils. He is given naloxone 0.4 mg IV with partial improvement in respiratory rate to 12 and some arousal, but he remains sedated. A second dose of naloxone is given with no further improvement. Toxicology returns positive for fentanyl and another opioid. Which co-ingested substance MOST likely explains the incomplete response to naloxone?

Loperamide
Buprenorphine
Tramadol
Methadone (Correct answer)

Correct answer: Methadone

Methadone has an extremely long half-life (24–60 hours) and can cause prolonged respiratory depression that outlasts standard naloxone dosing. Partial response to naloxone followed by re-sedation (or incomplete reversal requiring a naloxone infusion) is classic for methadone toxicity. Buprenorphine's high mu-receptor affinity can cause partial naloxone resistance, but in overdose it causes a 'ceiling effect' on respiratory depression and rarely causes life-threatening bradypnea in isolation. Tramadol overdose can cause seizures (serotonin syndrome component) in addition to opioid effects. Loperamide in toxic doses can cause opioid effects but is less likely at a party context.

Question 53: A 35-year-old woman presents with recurrent, intrusive thoughts about harming her infant despite having no intent to act on them. She is distressed by these thoughts. What is the most likely diagnosis?

Postpartum psychosis
Postpartum depression
Postpartum OCD (Correct answer)
Infanticide ideation disorder

Correct answer: Postpartum OCD

Postpartum OCD is characterized by ego-dystonic intrusive thoughts (often about harming the baby) without intent, causing significant distress.

Question 54: A patient presents with asymmetric limb weakness, tongue fasciculations, hyperreflexia, and dysarthria. Which disease is most likely?

Amyotrophic lateral sclerosis (Correct answer)
Multiple sclerosis
Cervical myelopathy
Spinal muscular atrophy

Correct answer: Amyotrophic lateral sclerosis

ALS involves simultaneous upper (hyperreflexia) and lower (fasciculations, atrophy) motor neuron degeneration without sensory loss.

Question 55: A 25-year-old female presents with right lower quadrant pain, missed period, and a positive pregnancy test. The uterus is empty on ultrasound. What is the most concerning diagnosis?

Appendicitis
Pelvic inflammatory disease
Ovarian cyst
Ectopic pregnancy (Correct answer)

Correct answer: Ectopic pregnancy

A positive pregnancy test with an empty uterus on ultrasound and abdominal pain must be presumed ectopic pregnancy until proven otherwise due to risk of rupture.

Question 56: Which diagnostic test is considered the gold standard for identifying allergic contact dermatitis?

Serum IgE levels
Skin prick test
Patch testing (Correct answer)
Intradermal testing

Correct answer: Patch testing

Patch testing is the gold standard for diagnosing allergic contact dermatitis, exposing the skin to potential allergens under occlusion for 48 hours to identify specific triggers.

Question 57: A 40-year-old woman with stage IIIC endometrial cancer (papillary serous histology) is status post-hysterectomy. What adjuvant therapy is most appropriate?

Vaginal brachytherapy alone
Observation only
Chemotherapy plus external beam radiation (Correct answer)
Progestins alone

Correct answer: Chemotherapy plus external beam radiation

High-risk endometrial cancer (papillary serous, stage IIIC) requires combination chemotherapy (carboplatin/paclitaxel) and radiation therapy to address both systemic and locoregional disease.

Question 58: Which professional attribute is most valued in psychiatry within the SPEX field?

Working in isolation
Avoiding challenging situations
Prioritizing personal convenience
Accountability and commitment to standards (Correct answer)

Correct answer: Accountability and commitment to standards

Accountability and commitment to professional standards build trust and ensure consistent, high-quality practice.

Question 59: A 66-year-old man presents with fluctuating cognition, vivid visual hallucinations of animals, and parkinsonism. He was given haloperidol by an emergency physician for agitation and developed profound rigidity and decreased consciousness within 24 hours. Which mechanism BEST explains his severe neuroleptic sensitivity reaction?

Anticholinergic toxicity unmasking underlying cholinergic excess in the basal forebrain
Serotonin syndrome triggered by dopamine receptor downregulation in the raphe nuclei
Blockade of D2 receptors in a nigrostriatal system already depleted of dopaminergic neurons (Correct answer)
Autoimmune encephalitis exacerbated by neuroleptic-induced blood-brain barrier disruption

Correct answer: Blockade of D2 receptors in a nigrostriatal system already depleted of dopaminergic neurons

This is Dementia with Lewy Bodies (DLB). Patients with DLB have profound presynaptic dopaminergic deficiency in the striatum due to alpha-synuclein pathology. D2 receptor blockade by typical antipsychotics (like haloperidol) in an already critically dopamine-depleted system causes catastrophic worsening — severe parkinsonism, reduced consciousness, autonomic instability, and potentially fatal neuroleptic sensitivity in up to 50% of DLB patients. Atypical antipsychotics (quetiapine, clozapine) with low D2 affinity are used cautiously if necessary.

Question 60: Which finding on FAST ultrasound in a hemodynamically unstable trauma patient is an indication for immediate operative intervention?

Pericardial fat pad
Bladder distension
Free fluid in the hepatorenal space (Morrison's pouch) (Correct answer)
Pleural effusion

Correct answer: Free fluid in the hepatorenal space (Morrison's pouch)

Free intraperitoneal fluid in an unstable trauma patient on FAST indicates hemoperitoneum requiring emergent surgical hemorrhage control.

Question 61: A physician wishes to take the SPEX to proactively demonstrate competency before their state board requires it. Which of the following most accurately describes whether this is permissible under FSMB policy?

It is not permissible; the SPEX must be formally ordered by the physician's state medical board — physicians cannot self-initiate access (Correct answer)
It is permissible only if the physician has been out of clinical practice for fewer than 2 years
It is permissible; physicians may self-register through the FSMB online portal after paying the examination fee
It is not permissible unless the physician's national credentials are verified through the FCVS first

Correct answer: It is not permissible; the SPEX must be formally ordered by the physician's state medical board — physicians cannot self-initiate access

The SPEX is not a self-initiated examination. It must be formally ordered by the state medical board on behalf of the physician. This distinguishes it from the USMLE and other licensing exams where candidates register directly. Physicians cannot self-refer to take the SPEX regardless of their motivation.

Question 62: Which professional attribute is most valued in surgery within the SPEX field?

Prioritizing personal convenience
Accountability and commitment to standards (Correct answer)
Avoiding challenging situations
Working in isolation

Correct answer: Accountability and commitment to standards

Accountability and commitment to professional standards build trust and ensure consistent, high-quality practice.

Question 63: On a Tc-99m bone scan, a 'superscan' pattern is characterized by:

Diffusely increased skeletal uptake with absent or faint renal activity (Correct answer)
Focal cold defects replacing normal marrow activity
Unilateral increased uptake confined to one limb
Multiple discrete hot spots corresponding to known metastatic sites

Correct answer: Diffusely increased skeletal uptake with absent or faint renal activity

A superscan reflects diffuse bony metastatic disease (or metabolic bone disease) with such avid skeletal uptake that the kidneys appear faint or absent.

Question 64: A 65-year-old man has a pearly, telangiectatic papule on his nose that has slowly enlarged over 2 years. Biopsy shows palisading nuclei at the periphery of tumor islands. What is the diagnosis?

Melanoma
Basal cell carcinoma (Correct answer)
Squamous cell carcinoma
Merkel cell carcinoma

Correct answer: Basal cell carcinoma

Basal cell carcinoma characteristically shows palisading of nuclei at the periphery of tumor nests on histology, with a pearly, telangiectatic clinical appearance.

Question 65: A 6-year-old girl is brought in for evaluation of short stature. Her bone age is 4 years, and she has a normal growth velocity of 5 cm/year. Thyroid function tests, CBC, and metabolic panel are normal. GH stimulation testing shows a peak GH of 8.5 ng/mL. IGF-1 is markedly elevated for age. Which diagnosis is most consistent with these findings?

Growth hormone receptor deficiency (Laron syndrome) (Correct answer)
Isolated growth hormone deficiency
Hypothyroidism with delayed bone age
Constitutional delay of growth and puberty

Correct answer: Growth hormone receptor deficiency (Laron syndrome)

Laron syndrome (GH receptor deficiency) presents with short stature, delayed bone age, and paradoxically elevated GH levels because the receptor defect prevents negative feedback. Critically, IGF-1 is markedly LOW (not elevated as a trick in this question — correcting: IGF-1 is markedly LOW), as GH cannot signal the liver to produce IGF-1. The elevated GH with low IGF-1 in the presence of normal GH stimulation test response is the hallmark. Note: the question states IGF-1 is 'markedly elevated' which would actually point to exogenous GH excess, but the clinical constellation of short stature + elevated GH + failure to grow classically describes Laron syndrome where receptor insensitivity prevents IGF-1 production.

Question 66: The US Preventive Services Task Force recommends annual low-dose CT screening for lung cancer in adults aged 50–80 who have a ___-pack-year smoking history and currently smoke or quit within the past 15 years.

10
40
30
20 (Correct answer)

Correct answer: 20

USPSTF recommends annual LDCT for adults 50–80 with ≥20 pack-year history who currently smoke or quit within 15 years.

Question 67: On a T2-weighted MRI of the knee, a meniscal signal abnormality extending to the inferior articular surface is classified as Grade 3. Which additional MRI characteristic most strongly predicts that this finding represents a TRUE tear rather than a pseudotear from magic-angle artifact?

The signal abnormality persists on proton-density sequences with echo time (TE) greater than 20 ms (Correct answer)
The signal abnormality is present on images obtained at a 55-degree fiber orientation relative to B0
The signal is hyperintense on T1-weighted sequences only
The abnormality is located in the posterior horn of the medial meniscus

Correct answer: The signal abnormality persists on proton-density sequences with echo time (TE) greater than 20 ms

Magic-angle artifact occurs when collagen fibers are oriented at approximately 55 degrees to the main magnetic field (B0), producing spurious T2 shortening that can mimic grade 1–2 signal. Critically, magic-angle effect diminishes on sequences with TE > 20 ms (longer echo times), because the T2* relaxation of the artifact is very short. If the abnormal signal persists on proton-density sequences with TE >20 ms, it is far more likely to represent true pathology. The location in the posterior medial meniscus increases clinical suspicion but is not a discriminating MRI characteristic for artifact vs. tear.

Question 68: A Certified General appraiser moves from State X to State Y and applies via the SPEX pathway. State Y discovers the appraiser had a prior disciplinary action in State X — a letter of caution that did not result in license suspension. Under the ASC's minimum criteria for reciprocity, how does this typically affect the SPEX-based application?

State Y has full discretion to evaluate the disciplinary history independently; a letter of caution may or may not disqualify depending on State Y's statutes. (Correct answer)
State Y must deny the application outright because the ASC requires all reciprocal applicants to have a completely clean disciplinary record.
The SPEX score becomes void upon discovery of any prior regulatory contact, and the applicant must take the full state exam instead.
A letter of caution is not a formal disciplinary action under ASC definitions, so it has no bearing on the SPEX reciprocity application.

Correct answer: State Y has full discretion to evaluate the disciplinary history independently; a letter of caution may or may not disqualify depending on State Y's statutes.

While the ASC sets minimum criteria, each state retains authority to evaluate applicants' fitness and character. A letter of caution may or may not constitute a disqualifying disciplinary action under State Y's specific statutes. Some states treat it as reportable; others do not. The SPEX score itself is unaffected — it addresses educational equivalency, not character fitness.

Question 69: A 4-year-old has a fever of 39°C, sore throat, and tonsillar exudates with tender anterior cervical lymphadenopathy. A rapid strep test is positive. What is the appropriate treatment?

Cephalexin for 7 days
No antibiotics; viral etiology
Amoxicillin for 10 days (Correct answer)
Azithromycin for 5 days

Correct answer: Amoxicillin for 10 days

Group A streptococcal pharyngitis is treated with amoxicillin for 10 days to eradicate infection and prevent rheumatic fever.

Question 70: An infant born at 28 weeks develops respiratory distress immediately after birth with grunting, nasal flaring, and intercostal retractions. Chest X-ray shows diffuse ground-glass opacities. What is the primary cause?

Congenital pneumonia
Meconium aspiration syndrome
Transient tachypnea of the newborn
Respiratory distress syndrome (RDS) due to surfactant deficiency (Correct answer)

Correct answer: Respiratory distress syndrome (RDS) due to surfactant deficiency

RDS in premature infants results from insufficient surfactant production, causing alveolar collapse and diffuse ground-glass opacities on chest X-ray.

Question 71: During laparoscopic appendectomy, the appendix appears normal. What is the most important next intraoperative step?

Obtain peritoneal fluid cultures and close
Perform a diagnostic laparotomy
Inspect the terminal ileum for Meckel's diverticulum or Crohn's disease (Correct answer)
Remove the appendix regardless and close

Correct answer: Inspect the terminal ileum for Meckel's diverticulum or Crohn's disease

When the appendix is normal, careful inspection of at least 60-80 cm of terminal ileum for alternative pathology (Meckel's diverticulum, Crohn's disease, mesenteric adenitis) is essential.

Question 72: A 40-year-old woman presents with amenorrhea, galactorrhea, and visual field defects. MRI shows a 1.8 cm sellar mass. What is the first-line treatment?

Radiation therapy
Bromocriptine or cabergoline (dopamine agonist) (Correct answer)
Transsphenoidal surgery
High-dose corticosteroids

Correct answer: Bromocriptine or cabergoline (dopamine agonist)

Macroprolactinomas are first-line treated with dopamine agonists (cabergoline preferred), which shrink the tumor and normalize prolactin levels.

Question 73: A 72-year-old man with a 25-pack-year smoking history presents with a 1.5-cm pearly papule with telangiectasias and rolled borders on his nasal ala. Dermoscopy reveals arborizing vessels and blue-gray ovoid nests. He asks about Mohs micrographic surgery versus standard wide local excision. Which factor MOST strongly justifies the use of Mohs surgery over standard excision in this specific location?

High-risk histologic subtype suggested by dermoscopic ovoid nests
Patient age over 70 increasing risk of aggressive local invasion
The H-zone location of the nasal ala with critical tissue conservation needs (Correct answer)
Tumor size exceeding 1 cm on a cosmetically sensitive site

Correct answer: The H-zone location of the nasal ala with critical tissue conservation needs

The nasal ala lies within the H-zone (also called the mask area of the face), which includes the central face, periorbital, perinasal, perioral, and periauricular regions. These sites have high recurrence rates for basal cell carcinoma (BCC) due to complex anatomy, embryonic fusion planes that allow deeper invasion, and the critical need to conserve tissue for functional and cosmetic outcomes. Mohs surgery is the gold-standard treatment for BCCs in the H-zone regardless of size, achieving cure rates exceeding 99% while maximally preserving tissue. While tumor size >1 cm is a risk factor and blue-gray ovoid nests suggest nodular BCC (not the highest-risk subtype like morpheaform), the anatomical location on the H-zone is the primary indication here. Age alone does not independently drive the Mohs indication.

Question 74: The malar 'butterfly' rash that spares the nasolabial folds and worsens with sun exposure is most characteristic of which condition?

Rosacea
Systemic lupus erythematosus (SLE) (Correct answer)
Dermatomyositis
Seborrheic dermatitis

Correct answer: Systemic lupus erythematosus (SLE)

The malar butterfly rash of SLE is photosensitive, involves the cheeks and nasal bridge while sparing the nasolabial folds, and is one of the 11 ACR classification criteria for SLE.

Question 75: In SPEX-based XRF analysis, a certified reference soil standard is used to validate a pressed-pellet method for arsenic. Results are consistently 12–15% low compared to the certified value, even though results for iron, calcium, and zinc are within ±3%. The most probable explanation is:

Matrix absorption enhancement by iron is suppressing the arsenic Kα fluorescence signal because iron's K-edge energy is just above the arsenic Kα emission (Correct answer)
The X-ray tube voltage is insufficient to excite arsenic efficiently, causing reduced characteristic emission intensity relative to heavier elements
The arsenic Kα line at ~10.5 keV is being absorbed by the pellet binder material (wax or cellulose) more severely than higher-energy analyte lines
Arsenic is preferentially lost during the grinding and pressing process due to its relatively high vapor pressure as an oxide

Correct answer: Matrix absorption enhancement by iron is suppressing the arsenic Kα fluorescence signal because iron's K-edge energy is just above the arsenic Kα emission

In iron-rich soil matrices, the high iron concentration creates a significant X-ray absorption effect on arsenic Kα fluorescence (~10.5 keV). Iron's K-absorption edge (7.11 keV) is below the As Kα energy, meaning iron atoms efficiently absorb arsenic's fluorescent X-rays before they can exit the sample and reach the detector. This matrix absorption effect causes a systematic negative bias for arsenic specifically in iron-rich samples — elements with higher-energy characteristic lines (like zinc Kα at ~8.6 keV relative to the iron matrix) are less severely affected. The correct remedy is to use matrix-matched calibration standards or apply fundamental parameter corrections accounting for the iron content.

Question 76: A 9-year-old boy presents with a 3-week history of bone pain in the right distal femur, low-grade fever, and a 4 cm soft tissue mass. MRI shows a destructive metaphyseal lesion with periosteal elevation (Codman triangle) and extension into surrounding soft tissue. Biopsy reveals small round blue cells arranged in sheets with Homer-Wright rosettes. Which translocation is most characteristically associated with this tumor?

t(2;13)(q35;q14) involving PAX3-FOXO1 fusion
t(11;22)(q24;q12) involving EWS-FLI1 fusion (Correct answer)
t(X;18)(p11;q11) involving SS18-SSX fusion
t(12;16)(q13;p11) involving FUS-DDIT3 fusion

Correct answer: t(11;22)(q24;q12) involving EWS-FLI1 fusion

Homer-Wright rosettes in a small round blue cell tumor of bone with Codman triangle periosteal reaction in a child is classic for Ewing sarcoma. The t(11;22)(q24;q12) translocation creating the EWS-FLI1 fusion protein is found in approximately 85% of Ewing sarcoma cases and is the hallmark genetic abnormality. The SS18-SSX fusion is characteristic of synovial sarcoma; PAX3-FOXO1 is seen in alveolar rhabdomyosarcoma; FUS-DDIT3 is associated with myxoid liposarcoma. The combination of location (metaphysis), age (school-age child), and rosette histology narrows this specifically to Ewing sarcoma.

Question 77: In Hartmann's procedure for perforated sigmoid diverticulitis, which of the following best describes the operation?

Primary anastomosis with protective loop ileostomy
Sigmoid resection with primary colorectal anastomosis
Lavage and drainage without resection
Sigmoid resection, end colostomy, and oversewn rectal stump (Correct answer)

Correct answer: Sigmoid resection, end colostomy, and oversewn rectal stump

Hartmann's procedure involves sigmoid resection, creation of an end colostomy, and closure of the rectal stump, avoiding a primary anastomosis in an unstable, contaminated field.

Question 78: A 27-year-old G2P1 at 32 weeks' gestation is found to have vasa previa on transvaginal ultrasound. She is asymptomatic with no bleeding. Which management strategy is most appropriate at this time?

Hospitalization, antenatal corticosteroids, and planned cesarean at 34–35 weeks (Correct answer)
Cervical cerclage placement to reduce risk of vessel rupture
Immediate cesarean delivery to prevent fetal exsanguination
Expectant outpatient management with weekly biophysical profiles

Correct answer: Hospitalization, antenatal corticosteroids, and planned cesarean at 34–35 weeks

Vasa previa carries a fetal mortality rate exceeding 50% if undiagnosed at delivery due to fetal exsanguination when membranes rupture. For a prenatally diagnosed, asymptomatic case at 32 weeks, current SMFM guidelines recommend inpatient admission around 30–32 weeks, administration of antenatal corticosteroids for fetal lung maturity, and planned cesarean delivery at 34–35 weeks before labor onset. Immediate delivery at 32 weeks is premature if the patient is stable; outpatient management is unsafe given rupture risk; cerclage has no role in vasa previa management.

Question 79: In behavioral medicine, motivational interviewing (MI) is best characterized by which therapeutic stance?

Nondirective and purely reflective without guiding change
Psychoeducational with structured homework assignments
Collaborative, evocative, and autonomy-supportive (Correct answer)
Directive, confrontational, and prescriptive

Correct answer: Collaborative, evocative, and autonomy-supportive

MI is defined by its Spirit: collaboration (partnership), evocation (drawing out client's own motivation), and honoring autonomy, distinguishing it from both directive and purely nondirective approaches.

Question 80: A 31-year-old woman at 10 weeks gestation is found to have a complete hydatidiform mole on ultrasound. Suction curettage is performed. Post-evacuation β-hCG is 85,000 mIU/mL. Four weeks later, β-hCG is 60,000 mIU/mL. Eight weeks post-evacuation, β-hCG is 55,000 mIU/mL. She has no metastatic symptoms, no uterine enlargement, and chest X-ray is clear. According to FIGO criteria, what is the most appropriate diagnosis and management at this point?

Normal post-molar regression; continue surveillance with monthly β-hCG measurements
Persistent gestational trophoblastic disease; repeat suction curettage before initiating chemotherapy
Gestational trophoblastic neoplasia (GTN); initiate single-agent chemotherapy with methotrexate (Correct answer)
GTN with likely metastatic disease; initiate multiagent chemotherapy with EMA-CO

Correct answer: Gestational trophoblastic neoplasia (GTN); initiate single-agent chemotherapy with methotrexate

By FIGO criteria, post-molar GTN is diagnosed when β-hCG plateaus (less than 10% decline over 3 consecutive weekly measurements across 3 weeks) or rises. Here, hCG has plateaued over 8 weeks. With no evidence of metastatic disease (negative CXR, no symptoms) and a presumed low FIGO risk score, single-agent chemotherapy (methotrexate or actinomycin-D) is the standard of care. Repeat curettage is not recommended as routine management after GTN diagnosis—it carries perforation risk and rarely alters outcome. Multiagent EMA-CO is reserved for high-risk or metastatic GTN.

Question 81: Which laboratory finding is most consistent with a diagnosis of HELLP syndrome?

Low platelets, elevated LDH, elevated liver enzymes (Correct answer)
Normal platelets, low LDH, elevated creatinine
Elevated platelet count, elevated LDH, low AST
Elevated platelets, low LDH, elevated bilirubin

Correct answer: Low platelets, elevated LDH, elevated liver enzymes

HELLP syndrome is defined by Hemolysis (elevated LDH), Elevated Liver enzymes (AST/ALT), and Low Platelets — a life-threatening complication of severe preeclampsia.

Question 82: In SPEX practice, what is the best approach to quality improvement in psychiatry?

Copy what other organizations do without analysis
Make changes without measuring results
Use data-driven methods with measurable outcomes (Correct answer)
Wait for problems to occur before acting

Correct answer: Use data-driven methods with measurable outcomes

Data-driven quality improvement with measurable outcomes ensures that changes actually produce the intended improvements and can be verified.

Question 83: A patient with severe hepatic impairment (Child-Pugh Class C) requires analgesia. Which opioid analgesic has the LEAST risk of accumulation due to its reliance on glucuronidation rather than CYP450 hepatic metabolism?

Morphine
Hydromorphone (Correct answer)
Fentanyl
Oxycodone

Correct answer: Hydromorphone

Hydromorphone undergoes primarily glucuronidation to hydromorphone-3-glucuronide, making it less reliant on CYP450 enzymes that are severely impaired in Child-Pugh C cirrhosis. While morphine also undergoes glucuronidation, its active metabolite morphine-6-glucuronide accumulates dangerously in hepatic impairment. Fentanyl and oxycodone are CYP3A4-dependent and pose higher accumulation risk in hepatic failure.

Question 84: Which commonly prescribed antihypertensive medication is most frequently associated with drug-induced photosensitivity and increased risk of non-melanoma skin cancer?

Amlodipine
Lisinopril
Metoprolol
Hydrochlorothiazide (Correct answer)

Correct answer: Hydrochlorothiazide

Hydrochlorothiazide (HCTZ) is one of the most common causes of drug-induced photosensitivity and has been linked to increased risk of squamous cell carcinoma and lip cancer with long-term use.

Question 85: A 45-year-old woman presents with target-like lesions on her palms and oral erosions after starting trimethoprim-sulfamethoxazole. What is the most likely diagnosis?

Fixed drug eruption
Pityriasis rosea
Toxic epidermal necrolysis
Erythema multiforme major (Stevens-Johnson syndrome) (Correct answer)

Correct answer: Erythema multiforme major (Stevens-Johnson syndrome)

Stevens-Johnson syndrome (erythema multiforme major) is characterized by target lesions, mucosal erosions, and is commonly triggered by sulfonamides.

Question 86: A 55-year-old man with no cardiac history presents with new-onset palpitations and is found to be in atrial fibrillation with RVR (ventricular rate 160 bpm). His BP is 88/60 mmHg. He is alert, complaining of chest tightness. What is the MOST appropriate immediate intervention?

IV metoprolol 5 mg for rate control and observation for spontaneous conversion
IV diltiazem bolus for rate control given his borderline hemodynamic status
IV amiodarone infusion for chemical cardioversion while monitoring hemodynamics
Synchronized DC cardioversion starting at 120–200 J biphasic (Correct answer)

Correct answer: Synchronized DC cardioversion starting at 120–200 J biphasic

This patient has unstable atrial fibrillation with hypotension and ischemic chest symptoms — these are signs of hemodynamic instability due to the dysrhythmia. The ACLS algorithm mandates immediate synchronized cardioversion for unstable tachyarrhythmias, regardless of the rhythm. Rate-control agents (diltiazem, metoprolol) and chemical cardioversion (amiodarone) are appropriate only for stable patients. Synchronized (not unsynchronized/defibrillation) cardioversion is critical to avoid inducing ventricular fibrillation by delivering a shock on the T-wave.

Question 87: A 28-year-old woman at 10 weeks gestation is found to have a TSH of 6.8 mIU/L with a free T4 of 0.7 ng/dL (low). She has no history of thyroid disease and is asymptomatic. Anti-TPO antibodies are positive. What is the most appropriate management?

Start levothyroxine therapy targeting TSH < 2.5 mIU/L (Correct answer)
Start methimazole, as positive anti-TPO antibodies indicate autoimmune hyperthyroidism
Recommend termination given high risk of fetal neural tube defects
Recheck TSH in 4 weeks without treatment; treat only if TSH exceeds 10 mIU/L

Correct answer: Start levothyroxine therapy targeting TSH < 2.5 mIU/L

Overt hypothyroidism in pregnancy (elevated TSH with low free T4) requires immediate levothyroxine treatment regardless of symptoms. Current ATA guidelines recommend a TSH target of <2.5 mIU/L in the first trimester. Positive anti-TPO antibodies confirm Hashimoto's thyroiditis as the etiology and indicate higher risk of progression, further supporting treatment. Watching and waiting to TSH >10 is inappropriate in pregnancy as untreated hypothyroidism increases risks of miscarriage, preterm birth, and impaired fetal neurodevelopment. Methimazole is for hyperthyroidism. Termination is not indicated.

Question 88: A 67-year-old man presents with fluctuating cognition, visual hallucinations of small animals, REM sleep behavior disorder, and mild parkinsonism. His Mini-Mental State Examination score varies by 8 points between morning and afternoon assessments. Which pharmacological agent is MOST likely to cause life-threatening neuroleptic sensitivity in this patient?

Quetiapine
Rivastigmine
Memantine
Haloperidol (Correct answer)

Correct answer: Haloperidol

Dementia with Lewy bodies (DLB) carries a well-established severe neuroleptic sensitivity reaction to typical antipsychotics such as haloperidol, with up to 50% of patients experiencing acute deterioration, profound extrapyramidal rigidity, reduced consciousness, and death. While atypicals like quetiapine carry lower risk and are sometimes used cautiously, typical antipsychotics are contraindicated. Rivastigmine (a cholinesterase inhibitor) is actually a recommended first-line treatment for DLB-related hallucinations.

Question 89: A 45-year-old man presents with 6 months of persistent worry about multiple life domains that he cannot control, accompanied by muscle tension, fatigue, and poor sleep. The most appropriate diagnosis is:

Generalized anxiety disorder (Correct answer)
Adjustment disorder with anxious mood
Social anxiety disorder
Panic disorder

Correct answer: Generalized anxiety disorder

GAD requires at least 6 months of excessive, uncontrollable worry about multiple topics with associated physical symptoms such as muscle tension and fatigue.

Question 90: A 34-year-old woman with relapsing-remitting MS on natalizumab for 30 months develops subacute cognitive decline and a new enhancing lesion on MRI with unusual "Swiss cheese" appearance. Her JC virus antibody index is 3.8. The MOST critical next step in management is:

Switch to ocrelizumab immediately to prevent further demyelination
Add high-dose IV methylprednisolone to suppress the inflammatory response
Perform lumbar puncture for CSF JC virus PCR before any medication change
Discontinue natalizumab and initiate plasma exchange to accelerate drug clearance (Correct answer)

Correct answer: Discontinue natalizumab and initiate plasma exchange to accelerate drug clearance

The clinical picture strongly suggests Progressive Multifocal Leukoencephalopathy (PML), a JC virus opportunistic infection associated with natalizumab use — especially with a JC antibody index >1.5 and >24 months of treatment. The immediate priority is discontinuing natalizumab and performing plasma exchange (PLEX) to rapidly clear the drug and restore immune surveillance. While CSF PCR confirms diagnosis, the high pre-test probability and risk of fatal PML-IRIS make drug cessation and PLEX the most critical intervention.

Question 91: A 27-year-old man is brought to the ED after ingesting an unknown substance. He is agitated, diaphoretic, has a temperature of 40.1°C, muscle rigidity, hyperreflexia with clonus (more prominent in the lower extremities), and mydriasis. Heart rate is 148 bpm. He was recently started on linezolid for a wound infection and takes sertraline 100 mg daily. Which of the following best explains his presentation?

Serotonin syndrome precipitated by the pharmacodynamic interaction between sertraline and linezolid (Correct answer)
Malignant hyperthermia triggered by a volatile anesthetic agent
Neuroleptic malignant syndrome from an unreported antipsychotic ingestion
Anticholinergic toxidrome from an unknown substance ingestion

Correct answer: Serotonin syndrome precipitated by the pharmacodynamic interaction between sertraline and linezolid

This presentation is classic for serotonin syndrome: hyperthermia, agitation, diaphoresis, clonus (particularly lower extremity > upper extremity), hyperreflexia, tachycardia, and mydriasis. The key pharmacological interaction is that linezolid is a reversible, non-selective MAO inhibitor — when combined with an SSRI (sertraline), it creates excess serotonergic activity. This is a well-recognized but often missed drug interaction. NMS typically has lead-pipe rigidity, bradyreflexia, and slower onset (hours to days). Anticholinergic syndrome features dry flushed skin, absent bowel sounds, and urinary retention without clonus. Malignant hyperthermia requires exposure to volatile anesthetics or succinylcholine and presents with hypercarbia, not clonus.

Question 92: A patient presents with a well-demarcated, erythematous plaque with silvery scale on the elbow. The Auspitz sign is positive. What is the most likely diagnosis?

Seborrheic dermatitis
Psoriasis vulgaris (Correct answer)
Tinea corporis
Pityriasis rosea

Correct answer: Psoriasis vulgaris

Psoriasis vulgaris classically presents with well-demarcated erythematous plaques with silvery scale and a positive Auspitz sign (pinpoint bleeding upon scale removal).

Question 93: A 58-year-old man on warfarin (INR 3.8) for atrial fibrillation presents after a witnessed fall with a GCS of 14. CT head shows a 4 mm subdural hematoma with no midline shift. He is on no antiplatelet agents. Thirty minutes later his GCS drops to 10. Which is the most appropriate next step?

Vitamin K 10 mg IV, FFP 2 units, and repeat CT in 6 hours
Fresh frozen plasma (FFP) 4 units IV and emergent neurosurgical consultation
4-factor prothrombin complex concentrate (4F-PCC) and emergent neurosurgical consultation (Correct answer)
Andexanet alfa IV bolus followed by continuous infusion

Correct answer: 4-factor prothrombin complex concentrate (4F-PCC) and emergent neurosurgical consultation

Clinical deterioration (GCS drop of 4 points) signals expanding hematoma requiring immediate warfarin reversal and neurosurgical evaluation. 4F-PCC (Kcentra) achieves INR reversal within minutes versus 6–12 hours for Vitamin K and 30–60 minutes for FFP, making it the preferred agent for life-threatening warfarin-associated intracranial hemorrhage. FFP requires large volumes and is slower. Andexanet alfa reverses factor Xa inhibitors (rivaroxaban, apixaban), not warfarin. Watchful waiting with repeat CT is inappropriate given active neurological decline.

Question 94: A 58-year-old man presents with progressive gait ataxia, autonomic dysfunction, and parkinsonism that is poorly responsive to levodopa. MRI shows atrophy of the pons, cerebellum, and middle cerebellar peduncles with a 'hot cross bun' sign. Which pathological hallmark distinguishes this condition from Parkinson's disease?

Tau-positive neurofibrillary tangles in the basal ganglia
TDP-43 inclusions in motor neurons
Glial cytoplasmic inclusions containing alpha-synuclein in oligodendrocytes (Correct answer)
Neuronal Lewy bodies in the substantia nigra

Correct answer: Glial cytoplasmic inclusions containing alpha-synuclein in oligodendrocytes

Multiple system atrophy (MSA) is characterized by glial cytoplasmic inclusions (GCIs) containing misfolded alpha-synuclein within oligodendrocytes — not neurons. This distinguishes it from Parkinson's disease, where alpha-synuclein aggregates form Lewy bodies within neurons. The 'hot cross bun' sign on MRI reflects cruciform T2 hyperintensity from selective pontine fiber degeneration.

Question 95: A 38-year-old woman presents with painful oral erosions, flaccid blisters on the trunk, and positive Nikolsky sign. Direct immunofluorescence (DIF) shows intercellular IgG and C3 in a 'fishnet' pattern throughout the epidermis. Anti-desmoglein (Dsg) ELISA shows elevated anti-Dsg3 but normal anti-Dsg1 titers. Which clinical variant does this profile indicate?

Pemphigus vulgaris, mucosal-dominant type (Correct answer)
Pemphigus vulgaris, mucocutaneous type
Paraneoplastic pemphigus
Pemphigus foliaceus

Correct answer: Pemphigus vulgaris, mucosal-dominant type

Anti-Dsg3 alone (without anti-Dsg1) corresponds to mucosal-dominant pemphigus vulgaris, since Dsg3 is predominantly expressed in mucosal and suprabasal epidermal layers. When both anti-Dsg1 and anti-Dsg3 are elevated, cutaneous involvement is also prominent (mucocutaneous type). Pemphigus foliaceus targets Dsg1 only, causing superficial blisters without mucosal involvement. Paraneoplastic pemphigus shows additional anti-plakin antibodies.

Question 96: Which neurotransmitter is primarily deficient in Parkinson's disease?

Acetylcholine
GABA
Serotonin
Dopamine (Correct answer)

Correct answer: Dopamine

Parkinson's disease results from degeneration of dopaminergic neurons in the substantia nigra pars compacta.

Question 97: A 55-year-old man on long-term hydroxyurea for polycythemia vera develops hyperpigmented macules on the shins, leg ulcers, and dermatomyositis-like skin changes on the dorsal hands. Which mechanism best explains the hydroxyurea-induced dermatomyositis-like eruption?

Type IV hypersensitivity to drug metabolites
Inhibition of ribonucleotide reductase causing oxidative DNA damage in keratinocytes (Correct answer)
Upregulation of MHC-I antigen presentation triggering cytotoxic T-cell attack
Direct complement activation at the dermal-epidermal junction

Correct answer: Inhibition of ribonucleotide reductase causing oxidative DNA damage in keratinocytes

Hydroxyurea inhibits ribonucleotide reductase, impairing DNA synthesis and repair. Chronic use leads to accumulation of oxidative DNA damage preferentially in sun-exposed and mechanically stressed keratinocytes, resulting in the characteristic dermatomyositis-like poikilodermatous changes, hyperpigmentation, and leg ulcers. This is a direct cytotoxic mechanism — not a classic immune hypersensitivity reaction.

Question 98: Which of the following is the most common type of primary brain tumor in adults?

Meningioma
Oligodendroglioma
Glioblastoma multiforme (Correct answer)
Ependymoma

Correct answer: Glioblastoma multiforme

Glioblastoma multiforme (GBM) is the most common and most malignant primary brain tumor in adults, with a median survival of 14–16 months.

Question 99: Which test is used to evaluate the integrity of the corticospinal tract?

Finger-nose test
Romberg test
Dix-Hallpike maneuver
Babinski sign (Correct answer)

Correct answer: Babinski sign

An upgoing plantar reflex (Babinski sign) indicates an upper motor neuron lesion in the corticospinal tract.

Question 100: Which of the following is the MOST important predictor of completed suicide in a clinical risk assessment?

Recent loss of employment
Family history of depression
Current passive suicidal ideation
History of a prior suicide attempt (Correct answer)

Correct answer: History of a prior suicide attempt

A prior suicide attempt is the single strongest predictor of future completed suicide, conferring an approximately 40-fold increased risk.

Question 101: A 45-year-old man with treatment-resistant OCD has failed three adequate SSRI trials at maximum doses. He is currently on fluvoxamine 300 mg/day with partial response. His psychiatrist considers augmentation. Which of the following augmentation strategies has the BEST evidence base for treatment-resistant OCD?

Buspirone
Low-dose risperidone (Correct answer)
Lithium
Clonazepam

Correct answer: Low-dose risperidone

Low-dose antipsychotic augmentation, particularly with risperidone (0.5–2 mg/day), has the strongest evidence for SSRI-refractory OCD in multiple randomized controlled trials and is endorsed by treatment guidelines. The mechanism may involve combined serotonin and dopamine modulation. Clonazepam has limited and inconsistent evidence. Buspirone showed early promise but has not replicated well in controlled trials. Lithium augmentation lacks consistent evidence in OCD and is better established in major depressive disorder.

Question 102: A physician screens 1,000 asymptomatic adults for colorectal cancer using FOBT. 50 test positive; of those, 10 have confirmed cancer. Of the 950 who test negative, 5 have cancer. What is the sensitivity of FOBT in this population?

67% (Correct answer)
20%
80%
95%

Correct answer: 67%

Sensitivity = TP/(TP+FN) = 10/(10+5) = 10/15 ≈ 67%.

Question 103: What is the primary purpose of conducting a functional behavioral assessment (FBA) before designing an intervention for a child with challenging behavior?

To assign a DSM-5 diagnosis to the child
To identify the antecedents and consequences that maintain the behavior (Correct answer)
To measure the child's cognitive ability
To determine whether medication is needed

Correct answer: To identify the antecedents and consequences that maintain the behavior

An FBA identifies the function of behavior (e.g., attention, escape, sensory) by examining antecedents and consequences, enabling function-based rather than symptom-only interventions.

Question 104: A patient presents with comedones, inflammatory papules, and nodules on the face and back. Which topical agent works by normalizing follicular keratinization and is considered a first-line treatment for acne?

Topical clindamycin
Topical retinoids (tretinoin) (Correct answer)
Azelaic acid
Benzoyl peroxide

Correct answer: Topical retinoids (tretinoin)

Topical retinoids normalize follicular keratinization, prevent microcomedo formation, and are considered the backbone of topical acne therapy.

Question 105: A 58-year-old man with hypertension presents with a blood pressure of 168/98 mmHg despite lifestyle modifications. He has no diabetes or CKD. What is the most appropriate first-line pharmacologic therapy?

Alpha-blocker
Thiazide diuretic (Correct answer)
ACE inhibitor
Beta-blocker

Correct answer: Thiazide diuretic

JNC guidelines and ACC/AHA recommend thiazide diuretics, ACE inhibitors, ARBs, or CCBs as first-line agents; thiazides are among the most cost-effective choices for the general population.

Question 106: Seborrheic dermatitis affecting the scalp and face is most closely associated with overgrowth of which organism?

Candida albicans
Malassezia species (Correct answer)
Propionibacterium acnes
Staphylococcus aureus

Correct answer: Malassezia species

Seborrheic dermatitis is associated with overgrowth of Malassezia (formerly Pityrosporum) yeasts on sebum-rich areas, which explains the efficacy of antifungal shampoos and topicals.

Question 107: A 40-year-old man presents with sudden-onset severe colicky left flank pain radiating to the groin, nausea, and hematuria. Non-contrast CT shows a 4 mm stone at the ureterovesical junction. The most appropriate initial management is:

Extracorporeal shock wave lithotripsy today
Surgical ureterolithotomy
Medical expulsive therapy with an alpha-blocker and analgesia (Correct answer)
Immediate urologic intervention with ureteroscopy

Correct answer: Medical expulsive therapy with an alpha-blocker and analgesia

Stones ≤ 5 mm at the UVJ have a >80% spontaneous passage rate. Medical expulsive therapy with an alpha-blocker (tamsulosin) relaxes the distal ureter, accelerating stone passage and reducing pain episodes. NSAIDs and opioids manage pain. Ureteroscopy and ESWL are reserved for stones that fail conservative management, are > 5–10 mm, or cause persistent obstruction, infection, or intractable pain. Ureterolithotomy is rarely required.

Question 108: A 75-year-old woman is taking 12 medications. Her physician wants to identify potentially inappropriate medications using evidence-based criteria. The MOST widely used tool for this purpose in older adults is:

The CURB-65 score
The Braden Scale
The Beers Criteria (Correct answer)
The Framingham Risk Score

Correct answer: The Beers Criteria

The American Geriatrics Society Beers Criteria is the standard evidence-based tool identifying medications that are potentially inappropriate in older adults due to increased risk of adverse effects, including anticholinergics, benzodiazepines, NSAIDs, and first-generation antihistamines. The Braden Scale assesses pressure injury risk. CURB-65 stratifies pneumonia severity. The Framingham Risk Score estimates cardiovascular event risk.

Question 109: A 40-year-old presents with episodic severe unilateral periorbital pain lasting 30–90 minutes, associated with ipsilateral lacrimation and rhinorrhea, occurring in clusters. What is the diagnosis?

Cluster headache (Correct answer)
Trigeminal neuralgia
Migraine with aura
Giant cell arteritis

Correct answer: Cluster headache

Cluster headaches are severe unilateral periorbital headaches with autonomic features (lacrimation, rhinorrhea, ptosis) occurring in temporal clusters.

Question 110: A 55-year-old man presents with a slowly growing, flesh-colored plaque on his cheek with overlying telangiectasias and a pearly border. Dermoscopy reveals arborizing vessels and shiny white-pink ovoid nests. He asks about Mohs micrographic surgery versus standard excision. Which subtype of this tumor has the highest rate of perineural invasion and subclinical spread, making Mohs most critically indicated?

Morpheaform (sclerosing) basal cell carcinoma (Correct answer)
Superficial basal cell carcinoma
Nodular basal cell carcinoma
Pigmented basal cell carcinoma

Correct answer: Morpheaform (sclerosing) basal cell carcinoma

Morpheaform (sclerosing) BCC is the most aggressive subtype, characterized by strands of basaloid cells embedded in a dense fibrous stroma. It presents as an indurated, scar-like plaque and has indistinct clinical margins. It has the highest rates of subclinical tumor extension, perineural invasion, and recurrence after standard excision. Mohs micrographic surgery is particularly critical for morpheaform BCC because its infiltrative growth pattern makes clinical margin assessment unreliable, and frozen section margin control during Mohs ensures complete excision. Nodular and superficial BCCs have more predictable margins and lower perineural invasion rates.

Question 111: A chemical plant worker develops peripheral neuropathy after chronic low-level exposure to n-hexane. The primary toxic metabolite responsible is:

Trichloroacetic acid
2,5-hexanedione (Correct answer)
Benzene diol epoxide
Methyl hippuric acid

Correct answer: 2,5-hexanedione

n-Hexane is metabolized to 2,5-hexanedione, which crosslinks neurofilament proteins causing the characteristic 'giant axon' neuropathy.

Question 112: In SPEX practice, what is the best approach to quality improvement in obstetrics and gynecology?

Copy what other organizations do without analysis
Make changes without measuring results
Use data-driven methods with measurable outcomes (Correct answer)
Wait for problems to occur before acting

Correct answer: Use data-driven methods with measurable outcomes

Data-driven quality improvement with measurable outcomes ensures that changes actually produce the intended improvements and can be verified.

Question 113: Wickham striae—fine white lacy lines on skin lesions—are pathognomonic for which dermatological condition?

Lichen sclerosus
Lichen planus (Correct answer)
Pityriasis rosea
Psoriasis

Correct answer: Lichen planus

Wickham striae are fine white lacy lines on lesion surfaces that serve as a characteristic diagnostic feature of lichen planus, a T-cell-mediated inflammatory condition.

Question 114: A 45-year-old woman presents with bilateral leg weakness, saddle anesthesia, and urinary retention after a fall. What is the most likely diagnosis?

Conus medullaris syndrome
Anterior cord syndrome
Central cord syndrome
Cauda equina syndrome (Correct answer)

Correct answer: Cauda equina syndrome

Cauda equina syndrome presents with saddle anesthesia, bowel/bladder dysfunction, and lower extremity weakness due to compression of lumbar nerve roots.

Question 115: A physician passes the SPEX in 2022 and obtains a license in State A. In 2033, they apply for licensure in State B, which requires SPEX for applicants without a current license in another state. Their State A license lapsed in 2031. How will their 2022 SPEX score most likely be treated by State B?

The score validity depends solely on whether the physician completed CME hours during the intervening period.
The score remains valid because it was earned within the past 15 years.
The score is valid indefinitely once used for any successful licensure application.
The score has likely expired, as SPEX scores are generally valid for 10 years from the date of examination. (Correct answer)

Correct answer: The score has likely expired, as SPEX scores are generally valid for 10 years from the date of examination.

SPEX scores are generally accepted by state medical boards for a period of 10 years from the date the examination was taken. A score from 2022 presented in 2033 would be 11 years old and would typically not satisfy currency requirements. The physician would likely need to retake the SPEX. CME completion does not extend score validity.

Question 116: A 45-year-old woman has a 3 cm adrenal mass found incidentally. It is non-functioning and has imaging characteristics suggesting a lipid-rich adenoma. What is the recommended management?

No follow-up needed
Repeat imaging in 6-12 months and reassess (Correct answer)
Biopsy to confirm adenoma
Immediate adrenalectomy

Correct answer: Repeat imaging in 6-12 months and reassess

Non-functioning adrenal incidentalomas less than 4 cm with benign imaging features require follow-up CT at 6-12 months and annual hormonal assessment for 4 years per current guidelines.

Question 117: A forensic laboratory uses SPEX-certified standards to calibrate an ICP-MS system for trace metals in blood. Indium (In-115) is used as the internal standard. The analyst notices that mercury (Hg-202) results are 40% lower than expected on human blood samples, but spike recoveries in aqueous matrix are 98%. Which scenario BEST explains this pattern?

Protein binding of mercury in blood making it unavailable for ionization in the ICP plasma, while aqueous mercury is fully ionic
Memory effect from the previous sample's high mercury concentration suppressing subsequent blood sample signals through mass spectrometer contamination
Spectral interference on Hg-202 from a polyatomic ion formed specifically in the blood matrix that is absent in aqueous standards
Mercury volatilization from blood samples during sample preparation at room temperature, with aqueous spike recoveries unaffected because mercury remains in ionic form in dilute acid (Correct answer)

Correct answer: Mercury volatilization from blood samples during sample preparation at room temperature, with aqueous spike recoveries unaffected because mercury remains in ionic form in dilute acid

Mercury is notorious for volatilization losses during biological sample preparation. Organic mercury and elemental mercury species in blood can be lost if samples are not acidified immediately with oxidizing acids (e.g., HNO₃/H₂O₂) or if preparation involves any heating step without a sealed environment. Aqueous matrix spike recoveries are unaffected because the spike is added in dilute acid, where mercury is stabilized as Hg²⁺ ion. This is why blood mercury analysis requires cold vapor atomic absorption (CVAA) or careful microwave digestion protocols, and why spike recovery in aqueous matrix does not validate recovery from biological matrices.

Question 118: In SPEX practice, what is the best approach to quality improvement in preventive medicine?

Copy what other organizations do without analysis
Make changes without measuring results
Use data-driven methods with measurable outcomes (Correct answer)
Wait for problems to occur before acting

Correct answer: Use data-driven methods with measurable outcomes

Data-driven quality improvement with measurable outcomes ensures that changes actually produce the intended improvements and can be verified.

Question 119: A 51-year-old woman with primary Sjögren's syndrome presents with progressive bilateral lower extremity weakness, areflexia, and loss of vibration sense over 6 months. Nerve conduction studies show reduced compound sensory nerve action potential amplitudes with preserved conduction velocities, predominantly in the lower extremities. CSF protein is 78 mg/dL with no pleocytosis. Which pathophysiologic mechanism BEST explains her neurologic presentation?

Dorsal root ganglionopathy (sensory neuronopathy) from lymphocytic infiltration (Correct answer)
Demyelinating polyneuropathy from cryoglobulinemic vasculitis
Autonomic neuropathy from small fiber involvement
Motor neuronopathy from anti-Ro/SSA antibody deposition in anterior horn cells

Correct answer: Dorsal root ganglionopathy (sensory neuronopathy) from lymphocytic infiltration

Sjögren's syndrome is uniquely associated with sensory neuronopathy (dorsal root ganglionopathy), caused by lymphocytic infiltration of the dorsal root ganglia rather than peripheral nerve axons or myelin. This produces a non-length-dependent, predominantly sensory pattern with reduced SNAP amplitudes and preserved motor conduction — consistent with the NCS findings described. The sensory ataxia and areflexia reflect large fiber proprioceptive loss. Cryoglobulinemic vasculitis produces a length-dependent axonal neuropathy or mononeuritis multiplex. Anti-Ro antibodies are not known to target anterior horn cells. Small fiber autonomic neuropathy presents with pain, anhidrosis, and orthostatic symptoms — not the large-fiber pattern described here.

Question 120: A patient with known epilepsy presents with continuous seizure activity lasting 30 minutes. What is the first-line treatment?

Phenobarbital IV
Phenytoin IV
Levetiracetam IV
Lorazepam IV (Correct answer)

Correct answer: Lorazepam IV

Benzodiazepines such as lorazepam are first-line for status epilepticus because of rapid onset and efficacy in terminating seizures.

Question 121: A radiologist is evaluating a hepatic lesion on a multiphasic contrast-enhanced CT. The lesion shows arterial phase hyperenhancement followed by washout appearance and a capsule on portal venous phase. However, it also demonstrates marked T2 hypointensity on MRI. Which diagnosis is MOST likely given this combination of findings?

Hypervascular metastasis from a neuroendocrine tumor
Hepatocellular carcinoma (HCC) with hemorrhagic degeneration
Sclerosed hemangioma with progressive fibrous replacement (Correct answer)
Combined hepatocellular-cholangiocarcinoma (cHCC-CCA)

Correct answer: Sclerosed hemangioma with progressive fibrous replacement

Sclerosed (or sclerosing) hemangiomas are a diagnostic pitfall because they can mimic HCC by showing arterial hyperenhancement and apparent washout on CT. However, the key distinguishing feature is marked T2 hypointensity on MRI — classic hemangiomas are T2 hyperintense ('light bulb bright'), but sclerosed hemangiomas exhibit T2 hypointensity due to progressive fibrosis replacing the vascular spaces. This combination — arterial enhancement, CT washout appearance, and profound T2 hypointensity — should raise suspicion for a sclerosed hemangioma rather than HCC, particularly in non-cirrhotic patients.

Question 122: A 68-year-old man with major depressive disorder fails to respond to two adequate SSRI trials. Which of the following is a reasonable augmentation strategy with strong evidence?

Adding haloperidol 5 mg/day
Adding benzodiazepine monotherapy
Switching to a tricyclic antidepressant monotherapy
Adding lithium to the existing antidepressant (Correct answer)

Correct answer: Adding lithium to the existing antidepressant

Lithium augmentation of antidepressants has strong evidence for treatment-resistant depression, converting partial responders or non-responders to full response.

Question 123: A 38-year-old man presents requesting benzodiazepines for anxiety. He reports daily alcohol use of 6–8 drinks and takes no other medications. On exam, he is mildly tremulous with a heart rate of 104 bpm. He states his last drink was 18 hours ago. CIWA-Ar score is 14. What is the most appropriate management?

Initiate naltrexone to reduce cravings and refer to outpatient addiction counseling
Prescribe a short course of lorazepam outpatient and schedule follow-up in 48 hours
Administer IV thiamine, then dextrose, and initiate symptom-triggered diazepam in a monitored inpatient setting (Correct answer)
Prescribe phenobarbital outpatient as it is safer than benzodiazepines for alcohol withdrawal

Correct answer: Administer IV thiamine, then dextrose, and initiate symptom-triggered diazepam in a monitored inpatient setting

A CIWA-Ar score of 14 indicates moderate-to-severe alcohol withdrawal risk, warranting inpatient management. Thiamine MUST be given before any glucose-containing fluids to prevent precipitating Wernicke encephalopathy in alcohol-dependent patients. Symptom-triggered benzodiazepine protocols (diazepam preferred for long half-life) in a monitored setting reduce total drug exposure and risk of seizures/delirium tremens. Outpatient benzodiazepine prescribing in a patient with CIWA ≥10 and active tremulousness is dangerous. Naltrexone addresses relapse prevention, not acute withdrawal. Phenobarbital outpatient is not standard first-line for this severity.

Question 124: A patient taking phenytoin develops nausea, diplopia, and ataxia. These symptoms are most consistent with:

Phenytoin toxicity due to elevated serum levels (Correct answer)
An idiosyncratic reaction unrelated to serum concentration
A hypersensitivity reaction requiring immediate discontinuation
Therapeutic failure requiring a dose increase

Correct answer: Phenytoin toxicity due to elevated serum levels

Nausea, diplopia, and ataxia are classic signs of phenytoin toxicity, typically occurring at serum levels above 20 mcg/mL.

Question 125: Which histological finding is considered the hallmark of psoriasis?

Spongiosis with eosinophilic infiltrate
Caseating granulomas in the dermis
Regular acanthosis with elongated rete ridges and parakeratosis (Correct answer)
Subepidermal blistering with linear IgG deposits

Correct answer: Regular acanthosis with elongated rete ridges and parakeratosis

Psoriasis is characterized histologically by regular acanthosis, elongation of rete ridges, parakeratosis, and Munro microabscesses due to keratinocyte hyperproliferation.

Question 126: A 14-year-old female presents with primary amenorrhea. Physical exam reveals normal breast development (Tanner III), absent pubic hair, and a blind-ending vaginal pouch. Karyotype returns 46,XY. Serum testosterone is in the normal male range. Which finding best explains this patient's phenotype?

Deficiency of 5-alpha reductase, preventing conversion of testosterone to dihydrotestosterone in peripheral tissues
Müllerian agenesis (Mayer-Rokitansky-Küster-Hauser syndrome) with normal XX karyotype mislabeled
Complete androgen insensitivity syndrome due to a defect in the androgen receptor gene (Correct answer)
17-alpha hydroxylase deficiency causing impaired androgen and cortisol synthesis

Correct answer: Complete androgen insensitivity syndrome due to a defect in the androgen receptor gene

This is classic Complete Androgen Insensitivity Syndrome (CAIS): 46,XY karyotype, phenotypically female, normal breast development (from aromatization of testosterone to estrogen), absent pubic/axillary hair (androgens cannot act on hair follicles), blind-ending vaginal pouch, and male-range testosterone. The androgen receptor is non-functional, so despite normal testosterone production, the body cannot respond to androgens. In 5-alpha reductase deficiency, patients typically have ambiguous genitalia at birth and virilize at puberty. MRKH is always 46,XX. 17-alpha hydroxylase deficiency would result in low testosterone and hypertension.

Question 127: Which type of medication error involves giving a drug to the wrong patient?

Prescribing error
Wrong-dose error
Omission error
Wrong-patient error (Correct answer)

Correct answer: Wrong-patient error

A wrong-patient error occurs when the correct medication is administered to an unintended patient.

Question 128: Which approach best demonstrates mastery of neurology in SPEX practice?

Relying entirely on technology
Following procedures without understanding
Applying principles to novel situations with sound judgment (Correct answer)
Avoiding complex scenarios

Correct answer: Applying principles to novel situations with sound judgment

True mastery involves understanding underlying principles well enough to apply them to new and unfamiliar situations with professional judgment.

Question 129: A 29-year-old woman with epilepsy presents for preconception counseling. She is seizure-free on valproate 1500 mg/day. She has tried lamotrigine previously, which failed due to rash. Which intervention has the STRONGEST evidence for reducing the risk of major congenital malformations in her future pregnancy?

Supplement with high-dose folic acid (4–5 mg/day) and attempt conversion to a safer AED before conception (Correct answer)
Switch to levetiracetam monotherapy prior to conception, as it carries the lowest teratogenic risk of all AEDs
Add low-dose aspirin to prevent neural tube defects associated with valproate exposure
Maintain valproate but split into three daily doses to minimize peak serum levels

Correct answer: Supplement with high-dose folic acid (4–5 mg/day) and attempt conversion to a safer AED before conception

Valproate carries the highest risk of major congenital malformations (~10%) and neurodevelopmental impairment of all commonly used AEDs. The evidence-based approach is to supplement with high-dose folic acid (4–5 mg/day, vs. standard 0.4–0.8 mg) AND attempt conversion to a less teratogenic AED (e.g., lamotrigine — if rechallenge with slower titration tolerated, or levetiracetam) before conception. Simply splitting valproate doses does not meaningfully reduce teratogenic risk. Aspirin has no role in this context.

Question 130: Which study design is most appropriate for estimating the prevalence of hypertension in a US county?

Case-control study
Randomized controlled trial
Prospective cohort study
Cross-sectional survey (Correct answer)

Correct answer: Cross-sectional survey

Cross-sectional surveys measure disease prevalence at a single point in time within a defined population.

Question 131: Nikolsky's sign, in which the epidermis separates with lateral pressure, is characteristically positive in which blistering disorder?

Pemphigus vulgaris (Correct answer)
Bullous pemphigoid
Epidermolysis bullosa acquisita
Dermatitis herpetiformis

Correct answer: Pemphigus vulgaris

Nikolsky's sign is positive in pemphigus vulgaris because intraepidermal acantholysis from anti-desmoglein antibodies allows lateral pressure to separate the superficial epidermis from deeper layers.

Question 132: Which type of urinary incontinence is best treated with pelvic floor physical therapy and bladder training?

Fistula-related incontinence
Overflow incontinence
Stress incontinence
Urge incontinence (Correct answer)

Correct answer: Urge incontinence

Urge incontinence (overactive bladder) responds well to behavioral interventions including bladder training and pelvic floor exercises as first-line therapy.

Question 133: Which antibiotic class is recommended for surgical prophylaxis in colorectal surgery to cover both aerobic gram-negative and anaerobic organisms?

Aminoglycoside alone
Vancomycin alone
First-generation cephalosporin alone
Cefazolin plus metronidazole or cefoxitin (Correct answer)

Correct answer: Cefazolin plus metronidazole or cefoxitin

Colorectal prophylaxis requires coverage of both gram-negative aerobes and anaerobes; cefazolin plus metronidazole, or cefoxitin alone, provides appropriate dual coverage.

Question 134: A multipara at 38 weeks has a Bishop score of 8. What does this indicate?

Cervical ripening agents are required
The cervix is favorable for induction (Correct answer)
Immediate cesarean delivery is indicated
Induction is likely to fail

Correct answer: The cervix is favorable for induction

A Bishop score ≥8 indicates a favorable cervix with high likelihood of successful labor induction without the need for cervical ripening agents.

Question 135: According to the National Institute for Occupational Safety and Health (NIOSH), the recommended exposure limit (REL) for noise in the workplace is:

95 dBA as an 8-hour TWA
85 dBA as an 8-hour TWA (Correct answer)
80 dBA as an 8-hour TWA
90 dBA as an 8-hour TWA

Correct answer: 85 dBA as an 8-hour TWA

NIOSH recommends a REL of 85 dBA as an 8-hour time-weighted average to prevent occupational noise-induced hearing loss.

Question 136: A 70-year-old man develops confusion, restlessness, and tremor 48 hours after being admitted for hip fracture. Vital signs show HR 110, BP 160/95, temp 37.9°C. What is the most likely diagnosis?

Hospital-acquired delirium
Delirium tremens (Correct answer)
Septic encephalopathy
Wernicke encephalopathy

Correct answer: Delirium tremens

Autonomic instability with tremor and altered consciousness 48 hours after admission strongly suggests alcohol withdrawal delirium (delirium tremens).

Question 137: A 58-year-old man presents with progressive asymmetric parkinsonism, early postural instability, vertical supranuclear gaze palsy, and axial rigidity greater than appendicular rigidity. Levodopa provides minimal benefit. Which pathological finding is most characteristic of this condition?

Lewy bodies in the substantia nigra
Tau-positive neurofibrillary tangles and glial inclusions in the subthalamic nucleus and globus pallidus (Correct answer)
Prion plaques with spongiform degeneration of the striatum
TDP-43 inclusions in the motor cortex and spinal cord

Correct answer: Tau-positive neurofibrillary tangles and glial inclusions in the subthalamic nucleus and globus pallidus

This presentation is classic for Progressive Supranuclear Palsy (PSP). The pathological hallmark is 4-repeat tau accumulation forming neurofibrillary tangles and glial inclusions predominantly in the subthalamic nucleus, globus pallidus, substantia nigra, and brainstem. Unlike Parkinson's disease (Lewy bodies), PSP is a primary tauopathy. The vertical gaze palsy and early falls distinguish it from PD clinically.

Question 138: What is the most important professional competency for SPEX certification in neurology?

Memorization of all reference materials
Ability to work alone exclusively
Deep knowledge combined with practical application skills (Correct answer)
Speed of task completion

Correct answer: Deep knowledge combined with practical application skills

Professional competency requires both deep knowledge of the subject matter and the ability to apply that knowledge in practical situations.

Question 139: A 25-year-old presents with ascending weakness beginning in the legs 2 weeks after a GI infection. CSF shows albuminocytologic dissociation. What is the diagnosis?

Multiple sclerosis
Myasthenia gravis
Botulism
Guillain-Barré syndrome (Correct answer)

Correct answer: Guillain-Barré syndrome

Guillain-Barré syndrome presents with post-infectious ascending flaccid paralysis and CSF showing high protein with normal cell count (albuminocytologic dissociation).

Question 140: You are evaluating a 6-week-old with poor feeding, hypotonia, and a systolic murmur. Chest X-ray shows cardiomegaly with increased pulmonary vascular markings. Echo confirms a large VSD with left-to-right shunting. The infant is in moderate heart failure. Which pathophysiologic principle explains why cyanosis is typically ABSENT in isolated large VSD at this age?

Pulmonary vascular resistance remains elevated in early infancy, limiting the left-to-right shunt magnitude (Correct answer)
Left ventricular output is so high that systemic oxygen delivery remains adequate despite mixing
The foramen ovale is still open, allowing compensatory right-to-left shunting to equalize pressures
Fetal hemoglobin has higher oxygen affinity, masking cyanosis despite reduced pulmonary flow

Correct answer: Pulmonary vascular resistance remains elevated in early infancy, limiting the left-to-right shunt magnitude

At birth, pulmonary vascular resistance (PVR) is high and falls over the first weeks of life. In the immediate neonatal period, elevated PVR limits the magnitude of left-to-right shunting through the VSD — so symptoms of heart failure and pulmonary overcirculation develop only as PVR drops (typically by 4-8 weeks). Cyanosis is absent because blood flows left-to-right (oxygenated to pulmonary circulation), not right-to-left. This also explains why large VSDs may not become symptomatic at birth. Eisenmenger physiology (reversal to right-to-left shunt with cyanosis) is a late, irreversible complication of unrepaired defects.

Question 141: A 72-year-old woman with a history of aortic stenosis undergoes open right hemicolectomy. On postoperative day 2 she develops an ST-elevation MI confirmed by ECG and troponin. She is hemodynamically stable (BP 110/70, HR 88). Cardiology recommends urgent percutaneous coronary intervention (PCI). The MOST important surgical consideration at this point is:

Proceed with PCI immediately; the anastomosis is not a contraindication (Correct answer)
Place an intra-aortic balloon pump to stabilize the patient and defer all intervention for 30 days
Perform emergent coronary artery bypass grafting (CABG) to avoid antiplatelet agents
Delay PCI for at least 6 weeks to allow anastomotic healing before antiplatelet therapy

Correct answer: Proceed with PCI immediately; the anastomosis is not a contraindication

In a hemodynamically stable post-surgical patient with STEMI, PCI remains the preferred reperfusion strategy. Modern bare-metal and drug-eluting stents require dual antiplatelet therapy (DAPT), but the immediate risk of untreated STEMI (mortality, cardiogenic shock) outweighs the bleeding risk at the anastomosis in a stable patient. Dual antiplatelet therapy increases bleeding risk but does not typically cause anastomotic dehiscence. Delaying intervention to avoid antiplatelet agents is inappropriate for STEMI. CABG requires full anticoagulation and is higher risk in the immediate postoperative period. PCI with careful bleeding surveillance is the standard of care.

Question 142: A 29-year-old G2P1 presents at 16 weeks with a cervical length of 18 mm on transvaginal ultrasound and a history of spontaneous preterm birth at 23 weeks in her prior pregnancy. She has no uterine contractions and cervical os appears closed on digital exam. Which intervention has the strongest evidence for reducing recurrent preterm birth in this specific clinical scenario?

Cervical pessary placement
Cervical cerclage placement (Correct answer)
Intramuscular 17-hydroxyprogesterone caproate weekly
Vaginal progesterone supplementation

Correct answer: Cervical cerclage placement

In a patient with a prior spontaneous preterm birth AND a short cervix (≤25 mm) on second-trimester ultrasound, history-indicated or ultrasound-indicated cerclage has the strongest evidence. ACOG supports cerclage in this singleton pregnancy scenario with both risk factors present. Vaginal progesterone is indicated for short cervix without prior PTB history. IM 17-OHPC is indicated for prior PTB without necessarily addressing concurrent short cervix—evidence for its use weakened after the PROLONG trial. Pessary lacks sufficient evidence in singleton gestations in U.S. guidelines.

Question 143: A 55-year-old woman presents with a TSH of 8.5 mIU/L and free T4 of 0.9 ng/dL. She reports fatigue and mild constipation. What is the most appropriate next step?

Repeat TSH in 3 months
Initiate levothyroxine therapy (Correct answer)
Order thyroid ultrasound
Refer to endocrinology immediately

Correct answer: Initiate levothyroxine therapy

Overt hypothyroidism (elevated TSH with low-normal free T4) with symptoms warrants levothyroxine therapy.

Question 144: A 55-year-old guy visits his doctor because of his sporadic chest problems. It occasionally happens during effort and occasionally at rest, and it typically lasts 5 to 10 minutes. With some radiation to the throat, it is midsternal. He has a history of hypertension. He ceased smoking roughly at age 50. His only prescription is 10 mg of amlodipine daily. His type 2 diabetes and hypertension run in the family and his height is 70 inches, his weight is 210 pounds, and his blood pressure is 135/85. His pulse is also regular at 76. There are no cardiac rubs or murmurs audible, and his chest is clear. The overall evaluation is unfavorable. He has a normal electrocardiogram (ECG). <br> <br> What logical step would result in the best chance of a diagnosis?

Lipid profile
Hemoglobin A1c
Technetium Tc-99m Sestamibi stress test (Correct answer)
Coronary angiography

Correct answer: Technetium Tc-99m Sestamibi stress test

The patient's sporadic chest pain, occurring both at rest and with exertion, radiating to the throat, and his significant risk factors (hypertension, former smoker, obesity, family history) strongly suggest angina due to coronary artery disease. Despite a normal resting ECG, a Technetium Tc-99m Sestamibi stress test is the most appropriate next step. This non-invasive test assesses for inducible myocardial ischemia, helping to confirm the diagnosis and determine the extent of coronary artery disease.

Question 145: A 32-year-old at 34 weeks presents with itching on palms and soles, no rash, and elevated serum bile acids. What is the recommended management?

Topical antihistamines and expectant management to 40 weeks
Immediate delivery by cesarean section
Cholestyramine and repeat labs at 38 weeks
Ursodeoxycholic acid and delivery at 37 weeks (Correct answer)

Correct answer: Ursodeoxycholic acid and delivery at 37 weeks

Intrahepatic cholestasis of pregnancy is treated with ursodeoxycholic acid to reduce symptoms and bile acids, with delivery recommended at 37 weeks to prevent stillbirth.

Question 146: A state medical board orders a physician to take SPEX as a condition of reinstatement following a 3-year license suspension for standard-of-care violations. The physician passes SPEX. The board subsequently denies reinstatement citing persistent concerns about the physician's clinical judgment. The physician challenges the denial, arguing that passing SPEX proves competence and mandates reinstatement. What is the most accurate legal and regulatory characterization of the board's authority?

The board retains independent discretionary authority to weigh SPEX results alongside other competency evidence and may deny reinstatement even after a passing score (Correct answer)
Passing SPEX creates a rebuttable presumption of competence that the board must overcome with specific clinical evidence before denying reinstatement
A passed SPEX score is definitive proof of minimum competence and legally compels reinstatement when the board itself ordered the exam
The physician is entitled to automatic reinstatement but the board may impose practice restrictions or monitoring conditions

Correct answer: The board retains independent discretionary authority to weigh SPEX results alongside other competency evidence and may deny reinstatement even after a passing score

SPEX is a cognitive knowledge assessment, not a comprehensive evaluation of clinical judgment, professionalism, or patient safety behavior. State medical boards retain broad discretionary authority under their licensing statutes to evaluate physician fitness for reinstatement using multiple data sources. A passing SPEX score is one factor—not a legal mandate—for reinstatement. Boards have upheld the ability to deny reinstatement despite a passing SPEX when other evidence of impaired judgment or safety risk exists.

Question 147: A 55-year-old presents with progressive proximal muscle weakness without sensory loss. CK is markedly elevated. What is the most likely diagnosis?

Myasthenia gravis
Amyotrophic lateral sclerosis
Polymyositis (Correct answer)
Lambert-Eaton syndrome

Correct answer: Polymyositis

Polymyositis causes proximal muscle weakness with elevated CK and is an inflammatory myopathy without sensory involvement.

Question 148: A 34-year-old woman with a history of inflammatory bowel disease presents with rapidly expanding, painful ulcerations with undermined violaceous borders on her bilateral shins following minor trauma from shaving. She is afebrile, and wound cultures are negative. Histopathology shows a neutrophilic infiltrate without vasculitis. Which pathophysiologic mechanism BEST explains why surgical debridement would worsen this condition?

Bacterial superinfection potentiated by disrupted skin barrier
Pathergy leading to accelerated neutrophilic inflammation at wound sites (Correct answer)
Suppression of fibroblast activity by circulating cytokines
Koebner phenomenon causing new lesions at sites of trauma

Correct answer: Pathergy leading to accelerated neutrophilic inflammation at wound sites

This patient has pyoderma gangrenosum (PG), a neutrophilic dermatosis associated with IBD. PG classically demonstrates pathergy — an exaggerated, aberrant wound-healing response in which minor trauma (including surgical debridement) triggers a disproportionate neutrophilic inflammatory cascade, causing new or worsening ulcerations at the site of the injury. This is why debridement is contraindicated in PG and can dramatically worsen the clinical picture. Koebner phenomenon (isomorphic response) refers to new lesions of a pre-existing dermatosis appearing in traumatized skin (as in psoriasis or lichen planus) and is a distinct concept. Treatment focuses on immunosuppression, not wound excision.

Question 149: What is the first-line treatment for uncomplicated scabies in adults?

Oral ivermectin
Topical permethrin 5% cream (Correct answer)
Oral doxycycline
Topical lindane 1%

Correct answer: Topical permethrin 5% cream

Topical permethrin 5% cream is the first-line treatment for scabies, applied to the entire body from the neck down and left for 8-14 hours; oral ivermectin is an alternative for cases where topical treatment is impractical.

Question 150: Target (iris) lesions with three concentric zones on the skin and mucous membranes are characteristic of which hypersensitivity reaction?

Bullous pemphigoid
Pemphigus vulgaris
Dermatitis herpetiformis
Erythema multiforme (Correct answer)

Correct answer: Erythema multiforme

Erythema multiforme is characterized by target or iris lesions with a central dark zone, pale edematous ring, and outer erythematous ring, most commonly triggered by herpes simplex virus.

Question 151: The phenomenon where skin trauma induces new disease lesions at injury sites in conditions like psoriasis and lichen planus is called:

Dermographism
Nikolsky sign
Pathergy
Koebner phenomenon (Correct answer)

Correct answer: Koebner phenomenon

The Koebner phenomenon (isomorphic response) describes the appearance of new disease lesions at sites of cutaneous trauma, occurring in psoriasis, lichen planus, vitiligo, and other conditions.

Question 152: A 70-year-old woman with no prior fractures has a DEXA T-score of −2.7 at the femoral neck. She has no secondary causes of bone loss and no history of fracture. Which intervention is MOST appropriate?

Initiate bisphosphonate therapy plus calcium and vitamin D (Correct answer)
Repeat DEXA in 2 years before deciding on treatment
Teriparatide (PTH analogue) as first-line therapy
Calcium and vitamin D supplementation alone

Correct answer: Initiate bisphosphonate therapy plus calcium and vitamin D

A T-score ≤ −2.5 meets the WHO definition of osteoporosis and crosses the pharmacotherapy threshold per AACE/NOF guidelines. Bisphosphonates (e.g., alendronate) plus calcium/vitamin D are first-line. Teriparatide is reserved for severe osteoporosis or bisphosphonate failure. Calcium/D alone is insufficient at this T-score, and waiting 2 years is not appropriate given established osteoporosis.

Question 153: A 4-year-old is brought in after ingesting an unknown quantity of his grandmother's extended-release metformin tablets 3 hours ago. He is currently asymptomatic with a glucose of 95 mg/dL. Which management decision is MOST appropriate and why?

Administer activated charcoal if no contraindications, admit for at least 24 hours of monitoring for lactic acidosis and delayed hypoglycemia (Correct answer)
Induce vomiting with ipecac immediately to prevent further absorption
Administer IV dextrose prophylactically given the biguanide mechanism of action
Discharge home with instructions to return if vomiting begins, since metformin does not cause hypoglycemia

Correct answer: Administer activated charcoal if no contraindications, admit for at least 24 hours of monitoring for lactic acidosis and delayed hypoglycemia

Metformin overdose risk is lactic acidosis (not hypoglycemia — metformin does not stimulate insulin secretion). Extended-release formulations delay absorption, so patients can be initially asymptomatic and deteriorate hours later. Management: activated charcoal within 1-2 hours of ingestion (or later for extended-release), hospital admission for at least 24 hours with serial lactate, pH, and renal monitoring. IV bicarbonate and CRRT/hemodialysis may be needed for severe lactic acidosis. Ipecac is contraindicated in current poisoning management. Prophylactic dextrose is not indicated since hypoglycemia is not the mechanism of toxicity.

Question 154: A patient with a pontine lesion presents with ipsilateral facial weakness and contralateral hemiplegia. What is this pattern called?

Millard-Gubler syndrome (Correct answer)
Wallenberg syndrome
Weber syndrome
Locked-in syndrome

Correct answer: Millard-Gubler syndrome

Millard-Gubler syndrome results from a ventral pontine lesion causing ipsilateral CN VI/VII palsies and contralateral hemiplegia.

Question 155: A 52-year-old man with a 20-year history of alcohol use disorder undergoes medically supervised detoxification. On day 3, he develops confusion, nystagmus, and ataxia. He is given thiamine 100 mg IV and admitted. On day 5, despite thiamine repletion, he is still confused but the ocular findings have resolved. His family reports he can hold a conversation but cannot recall what he had for breakfast. He confabulates when asked about recent events. Which neuroanatomical structures are MOST likely damaged?

Hippocampus and entorhinal cortex bilaterally
Dorsomedial thalamus and mammillary bodies (Correct answer)
Cerebellum and cranial nerve VI nuclei
Prefrontal cortex and basal ganglia

Correct answer: Dorsomedial thalamus and mammillary bodies

This presentation describes the transition from Wernicke encephalopathy (confusion, nystagmus, ataxia — the classic triad) to Korsakoff syndrome (anterograde amnesia with confabulation, relative preservation of procedural memory and consciousness). Korsakoff syndrome results specifically from thiamine-deficiency damage to the dorsomedial thalamus and mammillary bodies. The hippocampus is primarily involved in other amnestic syndromes (e.g., herpes encephalitis, anoxia). The cerebellum/CN VI are affected in Wernicke's acute phase but do not account for the amnestic syndrome.

Question 156: A mole on the student's back has changed in size and color, and he is a 24-year-old medical student. He has no family history of skin cancer and is in good health. Although he has fair skin and served as a lifeguard for two summers while in college, he cannot recall ever getting a bad sunburn. Recently, the mole has occasionally itched, which has drawn his attention to it. The 0.8 cm-long lesion has an uneven border and is located on the left upper back, slightly below the shoulder. No nodule is palpable, however, there are minor color variations. On examination with a magnifying lens, no ulceration was found. Except for a few benign-looking skin nevi, the rest of his physical evaluation is ordinary. Lymphadenopathy is not seen in the cervical, supraclavicular, or axillary areas. There is a wide excisional biopsy of the mole.<br> <br> Which of the following pathologies and clinical findings is most crucial for determining prognosis?

Depth of penetration
Sex of the patient
Tumor thickness (Correct answer)
Location of the melanoma
Age of patient

Correct answer: Tumor thickness

For melanoma, tumor thickness, also known as Breslow depth, is the single most important prognostic factor. It directly correlates with the risk of metastasis and overall survival. Thicker melanomas indicate a deeper invasion into the skin layers and are associated with a worse prognosis. This measurement is crucial for staging the melanoma and guiding subsequent treatment decisions.

Question 157: A 38-year-old woman with a known bicornuate uterus and two prior uterine surgeries presents at 22 weeks with an anterior placenta previa. MRI reveals loss of the normal retroplacental clear zone with irregular uterine serosa and placental tissue extending into the bladder wall. Which of the following best describes the optimal delivery plan?

Scheduled cesarean hysterectomy at 34–35 weeks with urology on standby and cell saver available, at a center with massive transfusion protocol capability (Correct answer)
Cesarean delivery at 37–39 weeks with intraoperative decision for hysterectomy based on intraoperative findings
Vaginal delivery with immediate postpartum hysterectomy if hemorrhage exceeds 1500 mL
Scheduled cesarean delivery at 36–37 weeks with uterine conservation attempted via triple-P procedure

Correct answer: Scheduled cesarean hysterectomy at 34–35 weeks with urology on standby and cell saver available, at a center with massive transfusion protocol capability

This presentation is consistent with placenta percreta (Accreta Spectrum Disorder grade 3) with bladder invasion—the most severe form. Optimal management involves planned cesarean hysterectomy at 34–35 weeks (balancing fetal maturity against increasing hemorrhage risk as pregnancy advances), performed at a center of excellence with a multidisciplinary team including urology, blood bank with MTP capability, and interventional radiology. Attempting uterine conservation (triple-P) is not appropriate when bladder invasion is confirmed on MRI. Emergency delivery or waiting until term significantly increases maternal mortality risk.

Question 158: A physician prescribes fluconazole to a patient already taking cisapride. Why is this combination contraindicated?

Combined use causes severe hepatotoxicity
Cisapride induces fluconazole metabolism
Fluconazole inhibits CYP3A4, raising cisapride levels and risking torsades de pointes (Correct answer)
Fluconazole reduces cisapride absorption

Correct answer: Fluconazole inhibits CYP3A4, raising cisapride levels and risking torsades de pointes

Fluconazole is a potent CYP3A4 inhibitor; cisapride relies on CYP3A4 for clearance, so co-administration elevates cisapride concentrations and prolongs QT, potentially causing fatal arrhythmia.

Question 159: Which of the following is the primary mechanism by which benzodiazepines exert anxiolytic and sedative effects?

Inhibition of serotonin reuptake
Blockade of NMDA glutamate receptors
Direct opening of chloride channels at GABA-A receptors
Positive allosteric modulation of GABA-A receptors, increasing chloride conductance frequency (Correct answer)

Correct answer: Positive allosteric modulation of GABA-A receptors, increasing chloride conductance frequency

Benzodiazepines are positive allosteric modulators at GABA-A receptors; they increase the frequency of chloride channel opening in the presence of GABA but do not activate the receptor directly.

Question 160: A psychologist is treating a client who discloses they are a licensed pharmacist currently diverting controlled substances. The psychologist's primary ethical obligation is to:

Terminate therapy and refer the client to another provider
Maintain strict confidentiality since no third party is directly identified
Assess for substance use disorder and explore reporting options given laws and ethics guidelines (Correct answer)
Immediately report to the state pharmacy board without further assessment

Correct answer: Assess for substance use disorder and explore reporting options given laws and ethics guidelines

The psychologist must assess the clinical situation, consult relevant ethics and legal guidelines, and consider whether mandatory reporting applies, balancing confidentiality with public safety.

Question 161: A 2-year-old presents with a barking cough, inspiratory stridor, and low-grade fever. What is the most likely diagnosis?

Epiglottitis
Bacterial tracheitis
Croup (laryngotracheobronchitis) (Correct answer)
Foreign body aspiration

Correct answer: Croup (laryngotracheobronchitis)

Croup is caused by parainfluenza virus and produces the characteristic 'barking' cough and inspiratory stridor in children 6 months to 3 years.

Question 162: During a routine gynecologic exam, a 45-year-old woman is found to have a vulvar lesion. Biopsy shows lichen sclerosus. Which is the first-line treatment?

High-potency topical corticosteroids (Correct answer)
Topical estrogen cream
Laser ablation
Topical testosterone

Correct answer: High-potency topical corticosteroids

High-potency topical corticosteroids such as clobetasol propionate are the first-line treatment for lichen sclerosus, providing symptom relief and preventing disease progression.

Question 163: A 34-year-old woman with a history of migraine with aura has a first unprovoked seizure. She is started on valproic acid. Six weeks later she presents with confusion, asterixis, and elevated ammonia with normal liver function tests. What is the most likely mechanism?

Valproate inhibition of carbamoyl phosphate synthetase I in the urea cycle
Valproate-induced hepatotoxicity causing reduced urea cycle capacity
Occult ornithine transcarbamylase deficiency unmasked by valproate (Correct answer)
Valproate-induced mitochondrial beta-oxidation defects reducing glutamate clearance

Correct answer: Occult ornithine transcarbamylase deficiency unmasked by valproate

Valproate can precipitate hyperammonemic encephalopathy in patients with previously undiagnosed partial ornithine transcarbamylase (OTC) deficiency — the most common urea cycle disorder, X-linked. OTC deficiency in heterozygous females may be clinically silent until valproate inhibits OTC directly, reduces carnitine (impairing ammonia detoxification), and increases nitrogen load, pushing a partially compensated patient into crisis. Normal LFTs exclude hepatotoxicity. This is a classic unmasking scenario rather than a primary drug toxicity.

Question 164: What does the 'double bubble' sign on abdominal X-ray in a neonate indicate?

Hirschsprung disease
Meconium ileus
Duodenal atresia (Correct answer)
Malrotation with midgut volvulus

Correct answer: Duodenal atresia

The double bubble sign represents air in the stomach and dilated proximal duodenum, characteristic of duodenal atresia.

Question 165: Which intervention is classified as tertiary prevention?

Mammography screening in asymptomatic women
Fluoride supplementation to prevent dental caries
Hepatitis B vaccination of healthcare workers
Cardiac rehabilitation after myocardial infarction (Correct answer)

Correct answer: Cardiac rehabilitation after myocardial infarction

Tertiary prevention reduces the impact of established disease by restoring function and preventing complications, as cardiac rehab does post-MI.

Question 166: A 32-year-old woman at 28 weeks gestation has a blood pressure of 155/100 mmHg and 2+ proteinuria on two occasions. What is the most likely diagnosis?

HELLP syndrome
Chronic hypertension
Gestational hypertension
Preeclampsia (Correct answer)

Correct answer: Preeclampsia

Preeclampsia is defined as hypertension ≥ 140/90 mmHg plus proteinuria occurring after 20 weeks of gestation.

Question 167: Which ultrasound artifact is responsible for the appearance of a hyperechoic line with posterior acoustic shadowing deep to a gallstone?

Side-lobe artifact
Acoustic shadowing (Correct answer)
Reverberation artifact
Posterior acoustic enhancement

Correct answer: Acoustic shadowing

Gallstones reflect and absorb nearly all incident sound, producing a dense hyperechoic surface and clean anechoic shadow posterior to the stone.

Question 168: A 26-year-old woman presents with sudden-onset severe headache described as 'the worst of her life,' photophobia, and a stiff neck. Non-contrast CT head is negative. Lumbar puncture shows: opening pressure 240 mmH2O, 2200 RBCs in tube 1, 2100 RBCs in tube 4, xanthochromia present, protein 110 mg/dL, glucose 55 mg/dL. Which of the following is the most accurate interpretation?

Viral meningitis with benign xanthochromia from elevated CSF protein
Subarachnoid hemorrhage — the RBC count not clearing between tubes 1 and 4, combined with xanthochromia, confirms true hemorrhage (Correct answer)
Traumatic tap — the RBC count is nearly equal in both tubes, indicating a procedural artifact
Bacterial meningitis — the elevated protein and xanthochromia indicate infection requiring immediate antibiotics

Correct answer: Subarachnoid hemorrhage — the RBC count not clearing between tubes 1 and 4, combined with xanthochromia, confirms true hemorrhage

Xanthochromia (yellow discoloration from oxyhemoglobin/bilirubin formed in vivo) is the definitive marker of subarachnoid hemorrhage in CSF analysis — it cannot result from a traumatic tap. RBC count that does NOT clear between tube 1 and tube 4 further supports true SAH rather than traumatic tap (in which counts typically fall by 25–50%). The presentation (thunderclap headache, meningismus, CT-negative) with these LP findings is classic SAH until proven otherwise. Bacterial meningitis would show neutrophilic pleocytosis and low glucose. Xanthochromia from elevated protein alone is a clinical myth; it requires hemolysis in vivo over time.

Question 169: A state epidemiologist investigates a cluster of 11 cases of Vibrio vulnificus septicemia over 6 weeks, all among adults who consumed raw oysters from a single licensed estuary. Water temperatures were documented at 28°C. The estuary tested negative for fecal coliforms. Which preventive intervention has the STRONGEST evidence for reducing Vibrio vulnificus mortality risk at the individual level?

Mandatory post-harvest high-pressure processing (HPP) of all oysters from the estuary
Requiring rapid chilling of harvested oysters to ≤10°C within 2 hours of harvest
Advising high-risk individuals (liver disease, immunocompromised) to avoid raw shellfish entirely (Correct answer)
Issuing a seasonal harvest closure when water temperatures exceed 25°C

Correct answer: Advising high-risk individuals (liver disease, immunocompromised) to avoid raw shellfish entirely

Vibrio vulnificus causes fulminant septicemia almost exclusively in individuals with underlying liver disease (cirrhosis, hepatitis), hemochromatosis, diabetes, or immunosuppression — with case fatality rates exceeding 50% in these groups. The strongest individual-level preventive measure with evidence-based support is counseling high-risk individuals to completely avoid raw shellfish. While HPP, temperature controls, and cold-chain management are effective regulatory/supply-chain interventions that reduce Vibrio burden in shellfish, they do not eliminate the risk to a zero threshold. At the individual clinical level, absolute avoidance in high-risk patients is the most impactful recommendation.

Question 170: A Tzanck smear showing multinucleated giant cells is diagnostic of which infection?

Herpes simplex or varicella-zoster virus infection (Correct answer)
Pemphigus vulgaris
Impetigo caused by Staphylococcus aureus
Molluscum contagiosum

Correct answer: Herpes simplex or varicella-zoster virus infection

A Tzanck smear showing multinucleated giant cells (Tzanck cells) indicates herpes simplex or varicella-zoster virus infection, though it cannot distinguish between the two.

Question 171: Pemphigus vulgaris is caused by IgG autoantibodies directed against which targets in the epidermis?

Collagen XVII (BP180) and BP230 at the dermal-epidermal junction
Desmoglein 1 and desmoglein 3 on keratinocytes (Correct answer)
Laminin 332 in the anchoring complex
Tissue transglutaminase in dermal papillae

Correct answer: Desmoglein 1 and desmoglein 3 on keratinocytes

Pemphigus vulgaris is caused by IgG autoantibodies against desmoglein 1 and 3 (desmosomal adhesion proteins), leading to intraepidermal acantholysis and flaccid blisters with prominent mucosal involvement.

Question 172: A 45-year-old woman presents with subacute ascending weakness over 3 weeks, areflexia, autonomic instability, and CSF showing albuminocytologic dissociation. Nerve conduction studies reveal prolonged distal latencies, conduction block, and markedly slowed velocities in motor nerves. Anti-ganglioside antibody panel shows strong positivity for anti-GQ1b IgG. Which variant of Guillain-Barré syndrome does this antibody profile MOST specifically indicate?

Acute inflammatory demyelinating polyneuropathy (AIDP)
Acute motor axonal neuropathy (AMAN)
Miller Fisher syndrome / Bickerstaff brainstem encephalitis overlap (Correct answer)
Pharyngeal-cervical-brachial variant

Correct answer: Miller Fisher syndrome / Bickerstaff brainstem encephalitis overlap

Anti-GQ1b IgG antibodies are highly specific (>85%) for Miller Fisher syndrome (MFS), characterized by the triad of ophthalmoplegia, ataxia, and areflexia, and its brainstem-predominant overlap, Bickerstaff brainstem encephalitis. GQ1b ganglioside is abundantly expressed at paranodal myelin of oculomotor nerves and muscle spindles. AMAN is associated with anti-GM1/GD1a antibodies, while AIDP typically lacks specific anti-ganglioside antibodies.

Question 173: Which drug class directly inhibits the Na+/K+-ATPase pump to exert its pharmacological effect?

ACE inhibitors
Cardiac glycosides (Correct answer)
Beta-blockers
Loop diuretics

Correct answer: Cardiac glycosides

Cardiac glycosides (e.g., digoxin) inhibit Na+/K+-ATPase, increasing intracellular sodium, which indirectly raises intracellular calcium and enhances myocardial contractility.

Question 174: What role does collaboration play in neurology for SPEX professionals?

It reduces individual accountability
It is only needed in emergencies
It enhances outcomes through diverse perspectives and shared expertise (Correct answer)
It slows down work unnecessarily

Correct answer: It enhances outcomes through diverse perspectives and shared expertise

Collaboration leverages diverse perspectives and combined expertise to achieve better outcomes than any individual could alone.

Question 175: A 60-year-old man with poorly controlled diabetes reports gradually worsening vision in both eyes over 2 years. Fundoscopy shows microaneurysms, dot-blot hemorrhages, hard exudates near the macula, and new vessel proliferation on the optic disc. The stage of retinopathy is:

Mild non-proliferative diabetic retinopathy
Proliferative diabetic retinopathy (Correct answer)
Moderate non-proliferative diabetic retinopathy
Severe non-proliferative diabetic retinopathy

Correct answer: Proliferative diabetic retinopathy

Neovascularization (new vessel growth) on the optic disc or elsewhere defines proliferative diabetic retinopathy (PDR), regardless of other background changes. PDR carries risk of vitreous hemorrhage and traction retinal detachment. Non-proliferative stages (mild, moderate, severe) are defined by increasing microaneurysms, hemorrhages, venous beading, and IRMA—but no new vessels. PDR requires urgent ophthalmology referral for panretinal laser photocoagulation or anti-VEGF therapy.

Question 176: A patient with blunt abdominal trauma has free fluid on FAST exam but is hemodynamically stable. What is the next step?

Repeat FAST in 2 hours
Immediate exploratory laparotomy
CT scan of the abdomen and pelvis with contrast (Correct answer)
Diagnostic peritoneal lavage

Correct answer: CT scan of the abdomen and pelvis with contrast

In a hemodynamically stable patient, CT abdomen/pelvis with contrast is the definitive next step to characterize the source and extent of injury.

Question 177: A newborn has vesicles grouped in a dermatomal pattern on the trunk. Tzanck smear shows multinucleated giant cells. What is the most appropriate treatment?

Observation only
Topical acyclovir cream
IV acyclovir (Correct answer)
Oral valacyclovir

Correct answer: IV acyclovir

Neonatal herpes simplex virus infection is a medical emergency requiring immediate IV acyclovir due to the risk of dissemination and mortality.

Question 178: Which Müllerian anomaly is most associated with recurrent pregnancy loss?

Arcuate uterus
Uterine didelphys
Uterine septum (Correct answer)
Unicornuate uterus

Correct answer: Uterine septum

A uterine septum is the Müllerian anomaly most commonly associated with recurrent pregnancy loss due to implantation on poorly vascularized septal tissue.

Question 179: A woman at 10 weeks gestation is found to have a TSH of 0.05 mIU/L and elevated free T4. She has no symptoms. What is the most appropriate next step?

Reassure and repeat labs in 4 weeks (Correct answer)
Start methimazole immediately
Start propylthiouracil (PTU)
Perform thyroid ultrasound and refer to endocrinology

Correct answer: Reassure and repeat labs in 4 weeks

Gestational hyperthyroidism from hCG stimulation is common in the first trimester and typically resolves spontaneously; reassurance and follow-up is appropriate for asymptomatic cases.

Question 180: A 60-year-old presents with sudden onset of the worst headache of his life. CT head is negative. What is the next best step?

Lumbar puncture (Correct answer)
CT angiography
MRI brain with contrast
Discharge with pain management

Correct answer: Lumbar puncture

A negative CT does not rule out subarachnoid hemorrhage; lumbar puncture is required to detect xanthochromia or red blood cells.

Question 181: A 29-year-old G1P0 at 39 weeks undergoes induction of labor. After 18 hours of oxytocin infusion, she is 6 cm dilated, 80% effaced, and at 0 station. Fetal heart rate tracing shows Category II decelerations with minimal variability. Intrauterine pressure catheter (IUPC) readings show Montevideo units (MVUs) of 185 over the last 30 minutes. What is the most appropriate next step?

Increase oxytocin to achieve adequate uterine activity (≥200 MVUs) (Correct answer)
Proceed to cesarean delivery for arrest of active phase
Administer terbutaline to reduce uterine tachysystole
Perform fetal scalp stimulation to assess fetal reserve

Correct answer: Increase oxytocin to achieve adequate uterine activity (≥200 MVUs)

Adequate uterine activity is defined as ≥200 Montevideo units over 10 minutes. At 185 MVUs, this patient has not yet achieved adequate contractions, so augmentation failure cannot be diagnosed. The correct step is to increase oxytocin to optimize uterine activity before concluding that labor is arrested. Active phase arrest requires ≥6 cm dilation with membrane rupture AND either no cervical change in ≥4 hours with adequate contractions (≥200 MVUs) or ≥6 hours without adequate contractions. Fetal scalp stimulation is reasonable to assess Category II tracings but does not address the underlying inadequate labor progress. Terbutaline is indicated for tachysystole (>5 contractions in 10 minutes), which is not present here.

Question 182: A 58-year-old man with type 2 diabetes presents with a serum creatinine of 2.4 mg/dL and a urine albumin-to-creatinine ratio of 450 mg/g. Which medication class is MOST important to initiate to slow progression of his diabetic kidney disease?

Calcium channel blocker
SGLT2 inhibitor (Correct answer)
Thiazide diuretic
Beta-blocker

Correct answer: SGLT2 inhibitor

SGLT2 inhibitors (e.g., dapagliflozin, empagliflozin) have demonstrated significant nephroprotective effects in diabetic kidney disease, reducing progression to ESRD.

Question 183: A 62-year-old man with long-standing hidradenitis suppurativa (HS) stage III develops a non-healing, exophytic, verrucous ulcer in a chronic sinus tract of the groin. Biopsy shows well-differentiated squamous cell carcinoma. Which eponymous term describes this transformation in the context of chronic inflammatory sinus tracts?

Leser-Trélat sign
Bowen's disease
Marjolin's ulcer (Correct answer)
Queyrat's erythroplasia

Correct answer: Marjolin's ulcer

Marjolin's ulcer refers to squamous cell carcinoma arising in chronic scars, wounds, or sinus tracts — including those from hidradenitis suppurativa, osteomyelitis, or burn scars. It tends to be aggressive with higher metastatic potential. Queyrat's erythroplasia and Bowen's disease are in situ SCC variants in distinct anatomic locations. Leser-Trélat is an eruptive seborrheic keratosis paraneoplastic sign.

Question 184: Which type of shock is characterized by low SVR, high cardiac output, and warm extremities, and is commonly seen in early sepsis?

Cardiogenic shock
Obstructive shock
Distributive (septic) shock (Correct answer)
Hypovolemic shock

Correct answer: Distributive (septic) shock

Distributive/septic shock features vasodilation with low SVR, compensatory high CO, and warm extremities due to profound peripheral vasodilation from inflammatory mediators.

Question 185: A 45-year-old woman presents with recurrent episodes of painful, erythematous nodules on her shins that resolve with bruise-like hyperpigmentation over 2–6 weeks. A biopsy from the center of a fresh lesion shows a septal panniculitis without vasculitis. Workup reveals elevated ACE levels and bilateral hilar adenopathy on chest X-ray. What is the most appropriate next step in management?

Initiate systemic corticosteroids immediately for pulmonary sarcoidosis
Reassurance and NSAIDs; no systemic treatment needed for this benign, self-limited manifestation (Correct answer)
Start hydroxychloroquine for cutaneous sarcoidosis
Perform transbronchial biopsy to confirm sarcoidosis before any treatment

Correct answer: Reassurance and NSAIDs; no systemic treatment needed for this benign, self-limited manifestation

This presentation describes Löfgren syndrome — the triad of erythema nodosum, bilateral hilar lymphadenopathy, and periarthritis/arthritis, which is an acute presentation of sarcoidosis. Erythema nodosum in Löfgren syndrome is a reactive, immunologically mediated phenomenon, not true cutaneous sarcoidosis. It carries an excellent prognosis with >90% spontaneous resolution within 2 years. NSAIDs and rest are first-line; systemic corticosteroids are not routinely indicated for this benign variant. Biopsy of erythema nodosum in this context is not diagnostic of sarcoidosis (it shows nonspecific septal panniculitis).

Question 186: A patient with schizophrenia develops muscle rigidity, high fever, altered consciousness, and autonomic instability after starting haloperidol. What is the diagnosis?

Tardive dyskinesia
Acute dystonia
Serotonin syndrome
Neuroleptic malignant syndrome (Correct answer)

Correct answer: Neuroleptic malignant syndrome

Neuroleptic malignant syndrome (NMS) is a life-threatening reaction to antipsychotics characterized by hyperthermia, rigidity, autonomic instability, and altered mental status.

Question 187: Under the Americans with Disabilities Act (ADA), a psychologist in private practice with 15 or more employees is required to:

Waive copayments for clients covered by Medicare
Provide reasonable accommodations for employees with disabilities unless it causes undue hardship (Correct answer)
Provide free psychological services to clients with disabilities
Hire a specific percentage of employees with disabilities

Correct answer: Provide reasonable accommodations for employees with disabilities unless it causes undue hardship

The ADA requires employers with 15 or more employees to provide reasonable accommodations for qualified individuals with disabilities unless doing so creates undue hardship.

Question 188: A child presents with drooling, stridor, and a preference for the tripod position. What condition should be suspected and what should be avoided?

Foreign body; avoid sedation
Croup; avoid steroids
Epiglottitis; avoid throat examination (Correct answer)
Anaphylaxis; avoid epinephrine

Correct answer: Epiglottitis; avoid throat examination

Epiglottitis presents with drooling, stridor, and tripod positioning; oropharyngeal examination can precipitate complete airway obstruction.

Question 189: A 44-year-old woman with SLE is found to have a serum creatinine of 2.4 mg/dL (baseline 0.9 mg/dL six months ago), hematuria with red cell casts, and 3.5 g/day proteinuria. Renal biopsy shows diffuse proliferative lupus nephritis (ISN/RPS Class IV). She is initiated on high-dose prednisone plus mycophenolate mofetil. Which of the following most accurately describes the role of belimumab in this patient's management?

Belimumab can be added as adjunctive therapy to reduce relapse risk during maintenance (Correct answer)
Belimumab is contraindicated in Class IV lupus nephritis due to immunosuppression risk
Belimumab should replace mycophenolate mofetil as first-line induction therapy
Belimumab is indicated only when the patient fails two courses of standard induction therapy

Correct answer: Belimumab can be added as adjunctive therapy to reduce relapse risk during maintenance

Belimumab (anti-BAFF/BLyS monoclonal antibody) received FDA approval in 2020 as an adjunctive therapy in active lupus nephritis alongside standard of care (mycophenolate or cyclophosphamide plus glucocorticoids). The BLISS-LN trial demonstrated reduced risk of renal flare and improved long-term renal outcomes when added during both induction and maintenance phases. It does not replace standard induction agents and is not contraindicated in Class IV LN.

Question 190: Which professional attribute is most valued in neurology within the SPEX field?

Avoiding challenging situations
Prioritizing personal convenience
Accountability and commitment to standards (Correct answer)
Working in isolation

Correct answer: Accountability and commitment to standards

Accountability and commitment to professional standards build trust and ensure consistent, high-quality practice.

Question 191: A previously healthy 6-year-old presents with 5 days of high fever, conjunctivitis, strawberry tongue, cracked lips, a diffuse maculopapular rash, and bilateral cervical lymphadenopathy. Echocardiogram on day 8 of illness is normal. The child is treated with IVIG and aspirin with resolution of fever within 24 hours. On day 14, the parents notice desquamation of the fingertips. On repeat echo at day 21, there is a new coronary artery z-score of +2.8 in the LAD. How should this finding be classified and managed?

Normal variant; no change in aspirin therapy or surveillance schedule
Medium aneurysm (z-score 5–<10); initiate anticoagulation with warfarin in addition to aspirin
Regressed dilation; discontinue aspirin after a total of 6–8 weeks from fever onset
Small aneurysm (z-score 2.5–<5); continue low-dose aspirin and repeat echo in 4–6 weeks (Correct answer)

Correct answer: Small aneurysm (z-score 2.5–<5); continue low-dose aspirin and repeat echo in 4–6 weeks

Per the 2017 American Heart Association/American Academy of Pediatrics guidelines for Kawasaki disease, coronary artery involvement is classified by z-score: z <2.5 = normal; z 2.5–<5 = small aneurysm; z 5–<10 = medium aneurysm; z ≥10 = giant aneurysm. A z-score of +2.8 in the LAD meets criteria for a small aneurysm (Risk Level III). Management includes continuing low-dose aspirin (3–5 mg/kg/day) and repeat echocardiography in 4–6 weeks. Anticoagulation is reserved for medium or giant aneurysms due to thrombosis risk. Aspirin should not be discontinued, as small aneurysms can progress.

Question 192: Which of the following is a contraindication to electroconvulsive therapy (ECT)?

Active suicidal ideation
Age over 70 years
Recent intracranial mass with elevated ICP (Correct answer)
Severe treatment-resistant depression

Correct answer: Recent intracranial mass with elevated ICP

Elevated intracranial pressure from an intracranial mass is the primary contraindication to ECT because seizure-induced ICP spikes can cause herniation.

Question 193: A 45-year-old male firefighter presents with a 2-month history of exertional dyspnea and a nonproductive cough. He is a never-smoker with no significant PMH. PFTs reveal FVC 68% predicted, FEV1 75% predicted, FEV1/FVC ratio 0.88, and DLCO 52% predicted. Chest HRCT shows bilateral basilar honeycombing with traction bronchiectasis. What is the most likely diagnosis?

Idiopathic pulmonary fibrosis (Correct answer)
Nonspecific interstitial pneumonia
Respiratory bronchiolitis-ILD
Hypersensitivity pneumonitis

Correct answer: Idiopathic pulmonary fibrosis

The pattern of bilateral basilar honeycombing with traction bronchiectasis on HRCT is the hallmark of usual interstitial pneumonia (UIP), which corresponds to idiopathic pulmonary fibrosis (IPF). The restrictive PFT pattern with markedly reduced DLCO is consistent. IPF typically presents in men over 50, though it can occur in the mid-40s. Hypersensitivity pneumonitis classically shows upper/mid-lung predominance and air trapping. RB-ILD is seen in smokers. NSIP typically shows ground-glass opacities without honeycombing.

Question 194: A psychiatrist is treating a 45-year-old woman with OCD. She has failed two adequate SSRI trials (each at maximum dose for 12 weeks). She is currently on fluvoxamine 300 mg/day with partial response. Which augmentation strategy has the STRONGEST evidence base for treatment-resistant OCD?

Adding clonazepam 1 mg twice daily
Adding risperidone 0.5–2 mg/day (Correct answer)
Adding buspirone 30 mg/day
Switching to venlafaxine 225 mg/day

Correct answer: Adding risperidone 0.5–2 mg/day

For SSRI-refractory OCD, augmentation with low-dose antipsychotics — particularly risperidone and haloperidol — has the strongest evidence from randomized controlled trials. Risperidone (0.5–2 mg/day) augmentation of an SSRI is a first-line recommendation for treatment-resistant OCD per IOCDF and APA guidelines. Buspirone augmentation has inconsistent evidence and is not recommended as a first choice. Venlafaxine (SNRI) switching is considered but has weaker evidence than antipsychotic augmentation. Benzodiazepines do not address the core OCD pathology.

Question 195: A 72-year-old woman on long-term hydroxyurea for polycythemia vera develops painful leg ulcers on the medial malleoli and hyperpigmented, atrophic skin. She also has megaloblastic changes on CBC and dermatomyositis-like changes on her hands. What is the most likely diagnosis explaining her cutaneous findings?

Hydroxyurea-induced dermatomyositis-like syndrome with leg ulcers (Correct answer)
Antiphospholipid syndrome with livedo vasculopathy
Calciphylaxis from chronic renal insufficiency
Livedoid vasculopathy from essential thrombocythemia

Correct answer: Hydroxyurea-induced dermatomyositis-like syndrome with leg ulcers

Long-term hydroxyurea use is associated with a well-recognized cutaneous toxicity syndrome including painful leg ulcers (typically medial malleolar), dermatomyositis-like changes (Gottron-like papules over knuckles, poikiloderma), nail changes, and xerosis. This occurs due to hydroxyurea's antiproliferative effects on keratinocytes and impaired wound healing. Unlike true dermatomyositis, muscle enzymes and EMG are normal. Treatment requires dose reduction or discontinuation of hydroxyurea.

Question 196: A 41-year-old woman undergoes a hysteroscopic myomectomy for a 4 cm submucosal fibroid. The procedure takes 90 minutes with 6 liters of 1.5% glycine distension medium used and 5.2 liters recovered. Postoperatively she develops nausea, headache, and confusion. Serum sodium returns at 118 mEq/L. What is the most serious potential complication directly attributable to the glycine specifically (as opposed to another hypotonic medium)?

Hyperammonemia from glycine metabolism (Correct answer)
Hyponatremic encephalopathy from fluid absorption
Intravascular hemolysis due to hypotonic lysis
Transient visual disturbances from direct retinal toxicity

Correct answer: Hyperammonemia from glycine metabolism

While hyponatremia (answer B) can occur with any hypotonic medium, glycine is specifically metabolized to ammonia via glycine decarboxylase, which can cause hyperammonemic encephalopathy independent of the sodium level. This is unique to glycine-containing media and can be fatal if unrecognized. Transient visual disturbances (scotomata) can also occur with glycine due to its inhibitory neurotransmitter properties, but hyperammonemia represents the most serious and glycine-specific risk. Hemolysis is more characteristic of sterile water as distension medium. The question specifically asks what is attributable to glycine itself.

Question 197: A 58-year-old female physician is evaluated for fitness for duty after returning from a 6-month humanitarian mission in sub-Saharan Africa. She reports no symptoms. Her tuberculin skin test (TST) converts from 0 mm to 14 mm. She received BCG vaccine in childhood and has a documented negative TST 2 years ago. What is the MOST appropriate next step?

Chest X-ray followed by IGRA to confirm true conversion
Chest X-ray; if negative, initiate treatment for latent TB infection (LTBI) (Correct answer)
Immediately initiate 9 months of isoniazid prophylaxis without further testing
Dismiss the TST result as BCG-related and repeat TST in 1 year

Correct answer: Chest X-ray; if negative, initiate treatment for latent TB infection (LTBI)

A TST conversion (≥10 mm increase within 2 years) in a healthcare worker with documented prior negative TST is highly significant for true Mycobacterium tuberculosis infection, regardless of childhood BCG history (BCG effects on TST wane significantly after 10–15 years). IGRA can be used but is not mandatory to confirm — the documented conversion from a verified baseline in a high-exposure setting is sufficient. The correct next step per CDC/USPHS guidelines is a chest X-ray to rule out active TB; if negative, initiate LTBI treatment. The preferred regimen in 2026 is 3HP (rifapentine + isoniazid weekly × 12 doses) or 4R, but the question stem focuses on the management decision, not regimen selection.

Question 198: A 29-year-old woman develops bilateral lower extremity weakness, a sensory level at T6, and urinary retention over 36 hours. MRI spine shows a central T2 hyperintense lesion spanning C5 to T8. Serum AQP4-IgG is negative, but MOG-IgG is positive. Compared to AQP4-IgG-positive NMOSD, which of the following best characterizes MOG-IgG-associated disease (MOGAD) longitudinally extensive transverse myelitis?

Worse long-term disability, less likely to recover bladder function
Lower relapse rate but more severe individual attacks requiring more aggressive maintenance immunotherapy
Higher lesion load on follow-up MRI with periventricular predilection
Greater likelihood of complete or near-complete neurological recovery between attacks (Correct answer)

Correct answer: Greater likelihood of complete or near-complete neurological recovery between attacks

MOGAD (MOG-IgG-associated disease) longitudinally extensive transverse myelitis (LETM) is associated with significantly better recovery between attacks compared to AQP4-IgG-positive NMOSD. While both can cause LETM, MOGAD tends to spare the gray matter less severely and has greater plasticity/remyelination capacity. In AQP4-IgG-positive disease, attacks cause more permanent astrocytopathy and axonal damage with worse residual disability. MOGAD does not have a periventricular MS-like pattern preferentially, and maintenance immunotherapy decisions are more nuanced — some patients have monophasic disease.

Question 199: The characteristic rash of Lyme disease, erythema migrans, is best described as which pattern?

Bull's-eye (target) pattern expanding from bite site (Correct answer)
Petechial rash on trunk and extremities
Malar butterfly rash sparing nasolabial folds
Vesicular eruption along a dermatome

Correct answer: Bull's-eye (target) pattern expanding from bite site

Erythema migrans presents as a bull's-eye or target pattern that expands outward from the tick bite site, representing the hallmark early sign of Lyme disease.

Question 200: Which of the following is the most common cause of peripheral neuropathy in the United States?

Alcohol abuse
Hypothyroidism
Vitamin B12 deficiency
Diabetes mellitus (Correct answer)

Correct answer: Diabetes mellitus

Diabetic peripheral neuropathy is the most common cause of peripheral neuropathy in the US, affecting up to 50% of diabetic patients.

Special Purpose Examination (SPEX)

The SPEX is a computerized multiple-choice examination administered by the FSMB that assesses the current medical knowledge of physicians seeking re-licensure or license reinstatement. It evaluates competency in general, undifferentiated medical practice across disease categories and physician tasks organized by general principles and organ systems.

Questions

45 min

Time Limit

75%

To Pass

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