Mixed Deck — All COMSAE Topics Flashcards

A 24-year-old male presents with a 6-month history of recurrent bloody diarrhea, lower abdominal cramping, and tenesmus. Colonoscopy reveals continuous, erythematous, and friable mucosa starting at the rectum and extending proximally to the splenic flexure. The inflammation is confined to the mucosal and submucosal layers. Which of the following is the most likely diagnosis?

Answer: Ulcerative colitis

The patient's presentation of bloody diarrhea, tenesmus, and colonoscopic findings of continuous inflammation limited to the mucosa starting in the rectum are classic for ulcerative colitis. Crohn's disease typically presents with discontinuous (skip lesions) and transmural inflammation and can occur anywhere in the GI tract. Irritable bowel syndrome does not have inflammatory findings on colonoscopy, and celiac disease primarily affects the small intestine.

Which electrolyte abnormality is the most immediately life-threatening complication of acute renal failure requiring emergent treatment?

Answer: Hyperkalemia

Hyperkalemia is the most immediately dangerous complication of acute renal failure because it can cause fatal cardiac arrhythmias including ventricular fibrillation.

A 65-year-old male with a long history of chronic hepatitis C infection is diagnosed with cirrhosis. During an upper endoscopy for evaluation of dyspepsia, numerous large, tortuous veins are noted in the distal esophagus. What is the primary pathophysiologic mechanism responsible for the formation of these varices?

Answer: Portal hypertension

Cirrhosis causes fibrosis and increased resistance to blood flow through the liver, leading to elevated pressure in the portal venous system, a condition known as portal hypertension. This increased pressure forces blood to be shunted through collateral vessels, such as the submucosal veins in the distal esophagus, causing them to become dilated and tortuous (varices).

A 30-year-old develops target-shaped lesions (concentric rings) on the palms and soles after a recent herpes simplex virus infection. There is no mucosal involvement. Which condition does this most likely represent?

Answer: Erythema multiforme minor

Erythema multiforme minor presents with classic targetoid lesions, typically triggered by HSV or Mycoplasma pneumoniae, without significant mucosal or systemic involvement.

Which cranial nerve is responsible for motor innervation to the muscles of mastication?

Answer: Trigeminal nerve (CN V3 - mandibular branch)

The Trigeminal nerve (CN V) is responsible for motor innervation to the muscles of mastication (chewing). Specifically, the mandibular branch (V3) of the trigeminal nerve innervates muscles such as the masseter, temporalis, and pterygoids. It also provides sensory innervation to the face, but its motor component is critical for jaw movement.

A 40-year-old woman presents with facial flushing, erythema across the nose and cheeks, telangiectasias, and papulopustules. She reports flares with sun exposure, hot beverages, and alcohol. Which diagnosis is most likely?

Answer: Rosacea

Rosacea is characterized by central facial erythema, flushing, telangiectasias, and papulopustules triggered by heat, alcohol, spicy food, and UV exposure.

A 34-year-old patient presents with acute right-sided sacroiliac joint pain after lifting a heavy box. Physical examination reveals a positive standing flexion test on the right, a deep sacral sulcus on the left, and a posterior and inferior inferior lateral angle (ILA) on the right. This combination of findings is most indicative of what type of sacral somatic dysfunction?

Answer: Right-on-right sacral torsion

In a right-on-right sacral torsion, the sacrum is rotated right on a right oblique axis. This results in the left sacral sulcus feeling deeper (more anterior) and the right ILA feeling more posterior and inferior. The positive standing flexion test on the right indicates the side of sacroiliac dysfunction. These three findings together are the classic presentation for a right-on-right forward sacral torsion.

A 30-year-old man presents with recurrent hematuria coinciding with upper respiratory infections (synpharyngitic hematuria). Kidney biopsy shows mesangial IgA deposits. What is the diagnosis?

Answer: IgA nephropathy (Berger disease)

IgA nephropathy (Berger disease) is characterized by mesangial IgA immune complex deposition, presenting with gross hematuria during mucosal infections (within 1-2 days).

What is the primary function of mitochondria in eukaryotic cells?

Answer: Energy production

Mitochondria are often referred to as the 'powerhouses' of the cell because their primary function is energy production. Through cellular respiration, they generate adenosine triphosphate (ATP), the main energy currency of the cell, from glucose and other fuel molecules. This process is crucial for nearly all cellular activities requiring energy.

A 35-year-old presents with flaccid bullae that rupture easily, leaving raw erosions. The Nikolsky sign is positive. Direct immunofluorescence shows IgG deposits in a 'fishnet' pattern throughout the epidermis. Which diagnosis is most likely?

Answer: Pemphigus vulgaris

Pemphigus vulgaris is characterized by IgG autoantibodies against desmoglein 1 and 3, causing suprabasal acantholysis, flaccid bullae, and a positive Nikolsky sign.

Which of the following techniques is a direct osteopathic manipulative treatment?

Answer: High-velocity, low-amplitude (HVLA) thrust

High-velocity, low-amplitude (HVLA) thrust is a direct osteopathic manipulative treatment technique. Direct techniques involve moving the dysfunctional body part towards the restrictive barrier, engaging it, and then applying a corrective force. HVLA specifically uses a rapid, therapeutic force of brief duration that travels a short distance within the anatomic range of motion, often resulting in an audible 'pop' or 'click'.

A physician is counseling the parents of a 5-month-old infant diagnosed with Severe Combined Immunodeficiency (SCID). Which of the following routine childhood immunizations is strictly contraindicated in this patient?

Answer: Measles-Mumps-Rubella (MMR)

The Measles-Mumps-Rubella (MMR) vaccine is a live-attenuated vaccine. Live vaccines are contraindicated in individuals with severe cellular immunodeficiency, such as SCID, because the weakened pathogen can replicate unchecked and cause a life-threatening infection. DTaP, IPV, and Hepatitis B are all inactivated or subunit vaccines and are safe to administer to immunocompromised patients, though the immune response may be suboptimal.

Which of the following core tenets of osteopathic medicine best describes the principle that the human body has an inherent capacity to defend, repair, and heal itself?

Answer: The body is capable of self-regulation, self-healing, and health maintenance.

The tenet that 'The body is capable of self-regulation, self-healing, and health maintenance' specifically articulates the osteopathic principle of the body's innate healing capacity. Osteopathic manipulative treatment (OMT) is often aimed at removing somatic barriers to allow this inherent capacity to function optimally. The other options are also core tenets but do not specifically address the self-healing mechanism.

A 24-year-old graduate student presents with a long history of unstable interpersonal relationships, frantic efforts to avoid real or imagined abandonment, and recurrent suicidal gestures. She describes a chronic feeling of 'emptiness' and has episodes of intense, inappropriate anger. Which of the following personality disorders best fits this clinical presentation?

Answer: Borderline Personality Disorder

This combination of symptoms, particularly the frantic efforts to avoid abandonment, identity disturbance (chronic feelings of emptiness), impulsivity (suicidal gestures), and affective instability (intense anger), is the hallmark of Borderline Personality Disorder, which is a Cluster B personality disorder.

Which of the following ABCDE features of a pigmented skin lesion is MOST associated with early melanoma detection?

Answer: Asymmetry — one half does not match the other

Asymmetry is a hallmark of melanoma; benign nevi are typically symmetric, whereas melanoma grows irregularly in different directions.

A 68-year-old female is diagnosed with multiple myeloma. Her initial lab work shows a hemoglobin of 9.2 g/dL, serum creatinine of 2.5 mg/dL, and serum calcium of 12.1 mg/dL. An X-ray reveals multiple lytic lesions in the vertebrae. Which of these findings is NOT part of the classic CRAB criteria for diagnosing symptomatic multiple myeloma?

Answer: Thrombocytosis (Platelets > 450,000/µL)

The CRAB criteria are used to identify end-organ damage in multiple myeloma and are an indication to begin treatment. The acronym stands for: C - Calcium elevation (>11 mg/dL), R - Renal insufficiency (serum creatinine >2 mg/dL or creatinine clearance 2 g/dL below the lower limit of normal), and B - Bone disease (one or more osteolytic lesions). Thrombocytosis is not part of the CRAB criteria; in fact, thrombocytopenia can sometimes be seen in advanced disease due to bone marrow infiltration.

On COMSAE, which acid-base disorder is expected in a patient with vomiting and nasogastric tube suctioning?

Answer: Metabolic alkalosis (hypochloremic, hypokalemic)

Loss of gastric HCl through vomiting or NG suction results in hypochloremic metabolic alkalosis with compensatory potassium loss via kidney aldosterone stimulation.

An osteopathic physician is treating a patient with pneumonia to improve lymphatic drainage and respiratory function. The physician focuses on treating the anatomical structure that serves as the primary muscle of respiration and whose proper function is critical for the pressure gradients that drive lymphatic flow. Dysfunction of which nerve would most directly impair this structure?

Answer: A. Phrenic nerve

The diaphragm is the primary muscle of respiration. Its contraction and relaxation are essential for creating the thoracoabdominal pressure gradient that drives both air movement and the return of lymph fluid. The diaphragm is innervated by the phrenic nerve, which originates from the C3, C4, and C5 spinal nerve roots.

Which type of epithelium lines the respiratory tract?

Answer: Pseudostratified columnar epithelium with cilia

The respiratory tract, from the nasal cavity down to the bronchi, is primarily lined by pseudostratified columnar epithelium with cilia. This specialized epithelium appears stratified but is actually a single layer of cells of varying heights, all attached to the basement membrane. The cilia on the surface, along with goblet cells that produce mucus, work together to trap and sweep foreign particles and pathogens out of the respiratory system.

What is the most common initial treatment for acute bacterial sinusitis?

Answer: Amoxicillin-clavulanate

For acute bacterial sinusitis, Amoxicillin-clavulanate is the most common initial antibiotic treatment. This combination antibiotic is often preferred due to its broader spectrum of activity, including coverage against beta-lactamase-producing bacteria, which are common in sinus infections. It helps to eradicate the bacterial infection and alleviate symptoms.