OCN Oncology Certified Nurse Exam — Questions and Answers

Question 1: When educating a survivor about sun protection after cancer treatment, the nurse should emphasize:

Avoid all sun exposure permanently indoors
Sunscreen is only needed at the beach
Use SPF 30+ broad-spectrum sunscreen, wear protective clothing, and avoid peak UV hours (Correct answer)
SPF 15 is sufficient for all cancer survivors

Correct answer: Use SPF 30+ broad-spectrum sunscreen, wear protective clothing, and avoid peak UV hours

Many cancer treatments increase photosensitivity; survivors need SPF 30+, protective clothing, and UV avoidance during peak hours (10 AM–4 PM).

Question 2: According to the NCCN distress thermometer guidelines, a distress score at which threshold warrants referral to psychosocial support services?

8 or above
4 or above (Correct answer)
6 or above
2 or above

Correct answer: 4 or above

NCCN guidelines recommend referral to appropriate resources when a patient scores 4 or higher on the Distress Thermometer.

Question 3: Tumor lysis syndrome (TLS) is most likely to occur in which cancer type?

Slow-growing solid tumors
Well-differentiated thyroid cancer
Hormone-sensitive breast cancer
Highly proliferative tumors such as Burkitt lymphoma or ALL (Correct answer)

Correct answer: Highly proliferative tumors such as Burkitt lymphoma or ALL

TLS most commonly occurs with highly proliferative hematologic malignancies like Burkitt lymphoma or ALL due to rapid cell lysis releasing intracellular contents.

Question 4: A patient with bone metastases reports sudden inability to void and new lower extremity weakness. The nurse should suspect:

Dehydration
Medication side effect from antiemetics
Spinal cord compression — a medical emergency (Correct answer)
Urinary tract infection

Correct answer: Spinal cord compression — a medical emergency

Urinary retention combined with new lower extremity weakness in a patient with bone metastases signals spinal cord compression, requiring emergent imaging and intervention.

Question 5: A patient with cancer reports a new severe headache rated 10/10 that began suddenly. The nurse's priority action is to:

Administer PRN acetaminophen and reassess in 1 hour
Notify the provider immediately — this may indicate CNS metastasis or hemorrhage (Correct answer)
Apply a cool cloth and dim the lights
Document and reassess at the next scheduled assessment

Correct answer: Notify the provider immediately — this may indicate CNS metastasis or hemorrhage

A sudden severe 'thunderclap' headache in a cancer patient is a red-flag symptom warranting immediate provider notification to rule out CNS emergency.

Question 6: A patient reports a pain level of 8/10 on opioid therapy. Which principle guides reassessment timing after a dose change?

Reassess only at the next scheduled visit
Reassess within 1 hour for IV opioids and 2 hours for oral opioids (Correct answer)
Reassess after 24 hours for all routes
Reassess only if the patient calls the nurse

Correct answer: Reassess within 1 hour for IV opioids and 2 hours for oral opioids

Reassessment after opioid dose adjustments should occur within 1 hour for IV and within 2 hours for oral routes to evaluate effectiveness.

Question 7: A patient with small cell lung cancer presents with facial swelling, venous distension of the neck and chest, and dyspnea. This presentation is most consistent with:

Cardiac tamponade
Pulmonary embolism
Superior vena cava (SVC) syndrome (Correct answer)
Tension pneumothorax

Correct answer: Superior vena cava (SVC) syndrome

SVC syndrome is caused by obstruction of the SVC, commonly by mediastinal tumors, leading to facial edema, neck vein distension, and dyspnea.

Question 8: A proto-oncogene becomes an oncogene through which process?

Mutation, amplification, or translocation that causes gain-of-function overactivation (Correct answer)
Loss-of-function mutation in a tumor suppressor
Normal aging-related methylation
Deletion of the gene entirely

Correct answer: Mutation, amplification, or translocation that causes gain-of-function overactivation

Proto-oncogenes become oncogenes when mutations, amplifications, or chromosomal translocations cause the gene product to become constitutively active.

Question 9: Which immune checkpoint inhibitor targets PD-1?

Durvalumab
Ipilimumab
Atezolizumab
Pembrolizumab (Correct answer)

Correct answer: Pembrolizumab

Pembrolizumab (Keytruda) is a monoclonal antibody that targets the PD-1 receptor on T cells, restoring anti-tumor immunity.

Question 10: A patient with cancer reports a pain level of 7/10 currently on acetaminophen alone. According to the WHO analgesic ladder, what is the next appropriate step?

Add a weak opioid such as tramadol or codeine (Step 2) (Correct answer)
Add a non-opioid adjuvant like gabapentin only
Refer the patient to a pain specialist before changing therapy
Initiate strong opioids such as morphine immediately (Step 3)

Correct answer: Add a weak opioid such as tramadol or codeine (Step 2)

The WHO three-step analgesic ladder recommends adding a weak opioid (Step 2) when a non-opioid alone provides inadequate pain control before escalating to strong opioids.

Question 11: A patient declines further chemotherapy and wants to focus on quality of life. The nurse's most appropriate response is:

Educate the patient until they change their mind
Withhold all medications as requested
Document and support the patient's autonomous decision, ensuring comfort care is in place (Correct answer)
Contact the physician to override the patient's decision

Correct answer: Document and support the patient's autonomous decision, ensuring comfort care is in place

Patient autonomy is a core ethical principle; the nurse should support, document, and facilitate the patient's informed decision to pursue comfort-focused care.

Question 12: What is 'equianalgesic dosing' used for in pain management?

Converting between different opioids or routes while maintaining equivalent pain control (Correct answer)
Determining when to stop opioid therapy
Measuring pain using a standardized scale
Calculating the maximum safe opioid dose

Correct answer: Converting between different opioids or routes while maintaining equivalent pain control

Equianalgesic dosing provides conversion ratios between opioids or routes to maintain equivalent analgesia when switching medications.

Question 13: What is the recommended minimum hours of oncology nursing practice required before sitting for the OCN exam?

2,000 hours
500 hours
1,000 hours (Correct answer)
3,000 hours

Correct answer: 1,000 hours

Candidates must have a minimum of 1,000 hours of oncology nursing practice within the past 2.5 years to be eligible for the OCN exam.

Question 14: Advance care planning discussions should occur at which point in the cancer care trajectory?

Only when the patient asks about it
Only after all curative treatment options fail
Only when the patient is admitted to hospice
Early in diagnosis, not only at end of life (Correct answer)

Correct answer: Early in diagnosis, not only at end of life

Evidence supports early advance care planning at diagnosis to allow patients time to reflect on values and make informed decisions without crisis pressure.

Question 15: Hyperviscosity syndrome is most commonly associated with which cancer?

Colon cancer
Waldenström macroglobulinemia or multiple myeloma (Correct answer)
Cervical cancer
Pancreatic cancer

Correct answer: Waldenström macroglobulinemia or multiple myeloma

Hyperviscosity syndrome results from excess paraproteins (IgM in Waldenström, or IgG/IgA in myeloma) thickening the blood and impairing flow.

Question 16: Which statement best describes the mechanism of action of checkpoint inhibitors such as pembrolizumab?

They prevent cancer cell DNA replication by cross-linking DNA strands
They directly kill cancer cells by binding to tumor antigens
They block inhibitory signals that cancer cells use to evade T-cell immune surveillance (Correct answer)
They stimulate bone marrow production of neutrophils

Correct answer: They block inhibitory signals that cancer cells use to evade T-cell immune surveillance

Pembrolizumab (anti-PD-1) blocks the PD-1/PD-L1 pathway that tumors exploit to suppress T-cell activity, restoring the immune system's ability to recognize and destroy cancer cells.

Question 17: Which factor most commonly triggers a cancer survivor's distress around surveillance imaging?

Discomfort with lying still in the scanner
Overconfidence about being cured
Lack of understanding of scan technology
Scanxiety — fear of recurrence around scheduled scans or test results (Correct answer)

Correct answer: Scanxiety — fear of recurrence around scheduled scans or test results

Scanxiety is the well-recognized pattern of heightened anxiety around surveillance imaging that many cancer survivors experience throughout their follow-up.

Question 18: Which type of radiation therapy delivers a high dose to a small target with steep dose fall-off, minimizing exposure to surrounding tissue?

Brachytherapy
Stereotactic radiosurgery (SRS) (Correct answer)
Conventional fractionated radiotherapy
Total body irradiation

Correct answer: Stereotactic radiosurgery (SRS)

Stereotactic radiosurgery (SRS) delivers high-dose, precise radiation to a small target using multiple beams that converge, sparing surrounding tissue.

Question 19: Metastasis occurs through which sequence of events?

Angiogenesis → extravasation → intravasation
Apoptosis → local invasion → circulation
Local invasion → intravasation → circulation → extravasation → colonization (Correct answer)
Colonization → circulation → local invasion

Correct answer: Local invasion → intravasation → circulation → extravasation → colonization

The metastatic cascade involves invasion of local tissue, entry into blood/lymphatics (intravasation), survival in circulation, exit (extravasation), and growth at a distant site.

Question 20: Which organization provides the primary standards for safe handling of hazardous drugs in oncology nursing?

National Cancer Institute (NCI)
Oncology Nursing Society (ONS) (Correct answer)
American Cancer Society (ACS)
Joint Commission (TJC)

Correct answer: Oncology Nursing Society (ONS)

The Oncology Nursing Society (ONS) publishes evidence-based guidelines for chemotherapy administration and hazardous drug safety.

Question 21: Which calculation method is most commonly used to determine chemotherapy dosing?

Actual body weight only
Ideal body weight only
Age-based dosing tables
Body surface area (BSA) (Correct answer)

Correct answer: Body surface area (BSA)

Chemotherapy doses are most commonly calculated using body surface area (m²) to standardize dosing across patient sizes.

Question 22: Why are immobilization devices (e.g., thermoplastic masks, body molds) used during radiation therapy?

To reduce radiation scatter to surrounding staff
To ensure reproducible patient positioning for each treatment fraction (Correct answer)
To protect the patient's skin from radiation burns
To shield critical organs from the radiation beam

Correct answer: To ensure reproducible patient positioning for each treatment fraction

Immobilization devices hold the patient in the exact same position for every treatment fraction, ensuring the radiation beam targets the tumor consistently throughout the course of therapy.

Question 23: A patient is prescribed bevacizumab. The nurse knows this drug targets which molecular pathway?

HER2/neu receptor
Vascular endothelial growth factor (VEGF) (Correct answer)
EGFR tyrosine kinase
BCR-ABL tyrosine kinase

Correct answer: Vascular endothelial growth factor (VEGF)

Bevacizumab is a monoclonal antibody that targets VEGF, inhibiting tumor angiogenesis.

Question 24: Which factor most strongly predicts a patient's ability to understand and act on cancer-related health information?

Education level
Health literacy level (Correct answer)
Socioeconomic status
Age

Correct answer: Health literacy level

Health literacy — the ability to obtain, understand, and use health information — is the strongest predictor of a patient's ability to navigate cancer care.

Question 25: Targeted therapy with imatinib (Gleevec) works by inhibiting which specific molecular target?

HER2 receptor
BCR-ABL tyrosine kinase (Correct answer)
VEGF receptor
EGFR receptor

Correct answer: BCR-ABL tyrosine kinase

Imatinib is a tyrosine kinase inhibitor that specifically targets the BCR-ABL fusion protein, which drives CML cell proliferation.

Question 26: Which of the following best describes the concept of 'informed consent' in oncology?

The patient signs a form agreeing to any treatment the physician recommends
The patient receives complete information about diagnosis, treatment options, risks, benefits, and alternatives to make a voluntary decision (Correct answer)
Consent is only required for surgical procedures
Family members can always provide consent instead of the patient

Correct answer: The patient receives complete information about diagnosis, treatment options, risks, benefits, and alternatives to make a voluntary decision

Informed consent requires that patients receive full disclosure of their condition, options, risks, benefits, and alternatives and voluntarily agree to the proposed treatment.

Question 27: Epithelial-to-mesenchymal transition (EMT) in cancer enables which key behavior?

Enhanced response to hormone therapy
Cancer cells to lose cell junctions and gain migratory and invasive properties (Correct answer)
Increased sensitivity to chemotherapy
Stable tumor growth without spread

Correct answer: Cancer cells to lose cell junctions and gain migratory and invasive properties

EMT is a developmental process hijacked by cancer cells to lose epithelial characteristics and gain mesenchymal traits, enabling migration and metastasis.

Question 28: Peripheral neuropathy induced by paclitaxel typically presents as which symptom pattern?

Central chest pain and paresthesia
Stocking-glove distribution numbness and tingling (Correct answer)
Unilateral facial numbness
Proximal muscle weakness only

Correct answer: Stocking-glove distribution numbness and tingling

Taxane-induced peripheral neuropathy typically causes a symmetric stocking-glove pattern of numbness, tingling, and burning in the extremities.

Question 29: Cultural competence in oncology nursing primarily means:

Treating all patients exactly the same regardless of background
Adapting care to respect patients' cultural beliefs, values, and communication preferences (Correct answer)
Assuming family members speak for patients from collectivist cultures
Learning only the dominant language of the patient population

Correct answer: Adapting care to respect patients' cultural beliefs, values, and communication preferences

Cultural competence involves recognizing and adapting to each patient's cultural context — including beliefs about illness, decision-making, and communication — to provide equitable, respectful care.

Question 30: Oral chemotherapy education should stress which of the following to patients?

Store in the bathroom medicine cabinet for convenience
Never handle tablets with bare hands and use safe disposal methods (Correct answer)
Crush tablets to improve absorption
Share doses with caregivers if they have the same cancer

Correct answer: Never handle tablets with bare hands and use safe disposal methods

Oral chemotherapy is still a hazardous drug requiring gloves for handling and proper disposal to protect the patient and household members.

Question 31: A nurse notes blood return is absent from a patient's port during chemotherapy infusion. What is the priority action?

Stop the infusion and assess for extravasation or port malfunction (Correct answer)
Continue infusion if no patient complaints
Flush aggressively with normal saline
Increase the infusion rate to clear the port

Correct answer: Stop the infusion and assess for extravasation or port malfunction

Loss of blood return may indicate port malfunction or tip migration; the infusion must be stopped immediately and the access assessed before continuing.

Question 32: TNM staging for solid tumors classifies cancers based on which three factors?

Tumor type, Necrosis, and Molecular markers
Tissue grade, Necrosis, and Margin status
Treatment response, Nodular pattern, and Metastasis
Tumor size/extent, lymph Node involvement, and Metastasis (Correct answer)

Correct answer: Tumor size/extent, lymph Node involvement, and Metastasis

TNM staging uses primary tumor extent (T), regional lymph node involvement (N), and distant metastasis (M) to classify cancer stage and guide treatment.

Question 33: Which chemotherapy class works by intercalating into DNA strands and inhibiting topoisomerase II?

Anthracyclines (Correct answer)
Alkylating agents
Antimetabolites
Vinca alkaloids

Correct answer: Anthracyclines

Anthracyclines such as doxorubicin intercalate into DNA and inhibit topoisomerase II, preventing DNA replication.

Question 34: Which of the following is a key component of a survivorship care plan (SCP)?

Insurance billing codes for all treatments received
Full pathology and surgical operative reports
Summary of cancer treatment received plus a follow-up plan for surveillance and late effects (Correct answer)
A list of all oncology team members and their credentials

Correct answer: Summary of cancer treatment received plus a follow-up plan for surveillance and late effects

A survivorship care plan includes a treatment summary and a forward-looking plan covering surveillance schedules, late effects, and health promotion.

Question 35: A survivor completing treatment should receive a survivorship care plan from which care setting?

Only from primary care after 5 years
The emergency department
The treating oncology team at the end of active treatment (Correct answer)
Only if the patient requests it in writing

Correct answer: The treating oncology team at the end of active treatment

The Commission on Cancer requires that oncology programs provide a comprehensive survivorship care plan to patients completing active treatment.

Question 36: A patient on a VEGFR tyrosine kinase inhibitor (TKI) develops hypertension. The nurse should recognize this as:

A sign of tumor lysis syndrome
An unrelated comorbidity
An allergic reaction requiring discontinuation
A predictable on-target side effect (Correct answer)

Correct answer: A predictable on-target side effect

Hypertension is a predictable, on-target side effect of VEGFR TKIs because VEGF normally promotes vasodilation.

Question 37: What is the definitive emergency treatment for malignant cardiac tamponade?

IV atropine
Emergent chest surgery
Pericardiocentesis (Correct answer)
IV corticosteroids

Correct answer: Pericardiocentesis

Pericardiocentesis (needle drainage of the pericardial effusion) is the definitive emergency treatment to relieve tamponade physiology.

Question 38: Which cancer type has a strong etiological link to Helicobacter pylori infection?

Colon cancer
Gastric (stomach) adenocarcinoma (Correct answer)
Pancreatic cancer
Liver cancer

Correct answer: Gastric (stomach) adenocarcinoma

H. pylori infection causes chronic gastric inflammation that over decades can progress to intestinal metaplasia, dysplasia, and gastric adenocarcinoma.

Question 39: Sexual health concerns in cancer survivors should be addressed using which approach?

PLISSIT model (Permission, Limited Information, Specific Suggestions, Intensive Therapy) (Correct answer)
Refer all sexual concerns to psychiatry without discussion
Avoid the topic unless the patient raises it first
Only address sexual health at the last visit

Correct answer: PLISSIT model (Permission, Limited Information, Specific Suggestions, Intensive Therapy)

The PLISSIT model provides a structured framework for progressively addressing sexual health concerns in cancer survivors within nursing practice.

Question 40: Tamoxifen is classified as which type of hormonal therapy?

Aromatase inhibitor
Androgen deprivation agent
Selective estrogen receptor modulator (SERM) (Correct answer)
GnRH agonist

Correct answer: Selective estrogen receptor modulator (SERM)

Tamoxifen is a SERM that competitively blocks estrogen receptors in breast tissue, reducing estrogen-driven tumor growth.

Question 41: A patient on high-dose corticosteroids for brain metastases should be monitored for which common complication?

Hypocalcemia
Thrombocytopenia
Hyponatremia
Hyperglycemia (Correct answer)

Correct answer: Hyperglycemia

Corticosteroids cause insulin resistance and gluconeogenesis, commonly causing hyperglycemia that requires monitoring and management.

Question 42: Which of the following is the correct definition of brachytherapy?

Fractionated external beam radiation
High-energy proton beam delivered externally
Radioactive source placed inside or near the tumor (Correct answer)
Systemic radiolabeled antibody therapy

Correct answer: Radioactive source placed inside or near the tumor

Brachytherapy involves placing a radioactive source directly inside or adjacent to the tumor, delivering high local doses.

Question 43: Aromatase inhibitors (e.g., anastrozole, letrozole) are used in postmenopausal breast cancer patients to achieve which effect?

Block estrogen at the receptor directly
Increase progesterone levels
Suppress ovarian estrogen production
Block conversion of androgens to estrogen in peripheral tissues (Correct answer)

Correct answer: Block conversion of androgens to estrogen in peripheral tissues

Aromatase inhibitors block the aromatase enzyme that converts androgens to estrogens in peripheral tissues, the main estrogen source in postmenopausal women.

Question 44: Chemotherapy combined with adjuvant radiation therapy is the proper course of treatment to reduce tumor size and improve blockage; that is the root cause of the syndrome. Treatment options for a pleural effusion might include chest tube insertion and thoracentesis. Superior vena cava syndrome cannot be effectively treated with packed red blood cell transfusions.

Apply soothing ointments to the lips for dryness and cracking
Rinse the mouth several times per day with a baking soda and warm water solution
All of these choices (Correct answer)
Use a soft, nylon toothbrush when brushing teeth.
None of these answer choices
Moisten foods with sauces, gravies and other liquids

Correct answer: All of these choices

The listed interventions are all crucial for managing common oral side effects experienced by oncology patients, such as mucositis, dry mouth, and chapped lips, which can exacerbate discomfort and impact nutrition. Using a soft toothbrush prevents gum irritation, moistening foods aids swallowing, applying ointments soothes dry lips, and baking soda rinses maintain oral hygiene and reduce inflammation. Implementing "All of these choices" provides comprehensive supportive care to improve patient comfort and oral health during treatment.

Question 45: An oncology nurse is preparing to administer a vesicant chemotherapy agent via peripheral IV. Which assessment finding requires the nurse to hold the infusion and reassess access?

The patient's blood pressure is 130/82 mmHg
The IV was placed 6 hours ago in the antecubital fossa
Patient reports mild anxiety about the infusion
Blood return is sluggish and the site shows swelling with infusion (Correct answer)

Correct answer: Blood return is sluggish and the site shows swelling with infusion

Sluggish blood return with swelling during vesicant infusion indicates possible extravasation, which must be stopped immediately to prevent tissue necrosis.

Question 46: Mucositis is most likely to develop in patients receiving which treatment?

Tyrosine kinase inhibitors
Checkpoint inhibitors
Anti-hormonal therapy
High-dose methotrexate or radiation to the head and neck (Correct answer)

Correct answer: High-dose methotrexate or radiation to the head and neck

Mucositis is a common and painful complication of high-dose methotrexate and radiation to the head/neck region due to damage to rapidly dividing mucosal cells.

Question 47: A patient undergoing radiation to the pelvis reports painful bowel movements and bloody diarrhea at week 4 of treatment. The nurse recognizes this as:

Pseudomembranous colitis
Acute radiation proctitis (Correct answer)
Chemotherapy-induced colitis
Radiation cystitis

Correct answer: Acute radiation proctitis

Pelvic radiation commonly causes acute radiation proctitis, characterized by diarrhea, rectal pain, and bleeding during the treatment course.

Question 48: Lynch syndrome (hereditary non-polyposis colorectal cancer) is caused by mutations in which genes?

APC and PTEN
Mismatch repair genes (MLH1, MSH2, MSH6, PMS2) (Correct answer)
RB1 and TP53
BRCA1 and BRCA2

Correct answer: Mismatch repair genes (MLH1, MSH2, MSH6, PMS2)

Lynch syndrome is caused by germline mutations in DNA mismatch repair genes, leading to microsatellite instability and increased risk of colorectal, endometrial, and other cancers.

Question 49: Bevacizumab (Avastin) targets tumor angiogenesis by inhibiting which growth factor?

Vascular endothelial growth factor (VEGF) (Correct answer)
Platelet-derived growth factor (PDGF)
Epidermal growth factor (EGF)
Fibroblast growth factor (FGF)

Correct answer: Vascular endothelial growth factor (VEGF)

Bevacizumab is a monoclonal antibody that binds and neutralizes VEGF, preventing the formation of new blood vessels that tumors need to grow.

Question 50: Immune-related adverse events (irAEs) from checkpoint inhibitors most commonly affect which organ systems?

Skin, GI tract, liver, and endocrine glands (Correct answer)
Brain exclusively
Heart and kidneys only
Bone marrow only

Correct answer: Skin, GI tract, liver, and endocrine glands

Checkpoint inhibitors cause autoimmune-like reactions most frequently in skin (rash), gut (colitis), liver (hepatitis), and endocrine organs (thyroiditis).

Question 51: When caring for a patient with malignant pleural effusion, which intervention provides the most immediate relief of dyspnea?

Positioning in high Fowler's and assisting with thoracentesis (Correct answer)
Encouraging incentive spirometry every hour
Administering a diuretic such as furosemide
Applying supplemental oxygen via nasal cannula at 2 L/min

Correct answer: Positioning in high Fowler's and assisting with thoracentesis

Thoracentesis to drain the effusion provides immediate relief of dyspnea by re-expanding the compressed lung; high Fowler's positioning aids breathing while preparing for the procedure.

Question 52: Tumor heterogeneity refers to which biological characteristic of cancers?

Genetic diversity among cells within the same tumor, leading to varied drug sensitivities (Correct answer)
Identical genetic profiles across primary and metastatic sites
Uniform cell populations within a tumor
The spread of cancer to multiple organs

Correct answer: Genetic diversity among cells within the same tumor, leading to varied drug sensitivities

Tumor heterogeneity means different cells within one tumor have different mutations, making some subpopulations resistant to specific treatments.

Question 53: A nurse notes that a patient's absolute neutrophil count (ANC) is 450 cells/mm³. Which classification and action is correct?

Severe neutropenia (< 500); initiate neutropenic precautions and notify provider (Correct answer)
Mild neutropenia; encourage handwashing only
Normal range; no special precautions needed
Critical value; administer packed red blood cells immediately

Correct answer: Severe neutropenia (< 500); initiate neutropenic precautions and notify provider

An ANC below 500 cells/mm³ is severe neutropenia, placing the patient at very high infection risk and requiring immediate neutropenic precautions, provider notification, and possible filgrastim therapy.

Question 54: Which antifungal drug interaction is most important to monitor in patients receiving voriconazole and certain chemotherapy agents?

Decreased steroid effectiveness
Increased antibiotic resistance
CYP450 enzyme inhibition increasing chemotherapy drug levels (Correct answer)
Reduced antiemetic efficacy

Correct answer: CYP450 enzyme inhibition increasing chemotherapy drug levels

Voriconazole inhibits CYP450 enzymes and can dramatically increase plasma levels of chemotherapy drugs metabolized by the same pathway, causing toxicity.

Question 55: Which drug class inhibits the mammalian target of rapamycin (mTOR) pathway in cancer treatment?

Bevacizumab and ramucirumab
Ipilimumab and nivolumab
Everolimus and temsirolimus (Correct answer)
Erlotinib and gefitinib

Correct answer: Everolimus and temsirolimus

Everolimus and temsirolimus are mTOR inhibitors used in renal cell carcinoma, neuroendocrine tumors, and certain breast cancers.

Question 56: Which route of administration is used for intrathecal chemotherapy?

Subcutaneous
Intravenous
Intraperitoneal
Into the cerebrospinal fluid space (Correct answer)

Correct answer: Into the cerebrospinal fluid space

Intrathecal chemotherapy is injected directly into the cerebrospinal fluid via lumbar puncture or Ommaya reservoir to treat or prevent CNS disease.

Question 57: Which statement about cancer survivorship is accurate?

Follow-up visits are only needed to monitor for cancer recurrence
Long-term side effects of treatment are rare and not worth discussing
Survivorship care begins only after a patient is declared cured
Survivorship encompasses physical, emotional, social, and financial effects from diagnosis onward (Correct answer)

Correct answer: Survivorship encompasses physical, emotional, social, and financial effects from diagnosis onward

Cancer survivorship begins at diagnosis and encompasses the full spectrum of physical, psychological, social, and financial challenges throughout and beyond treatment.

Question 58: Which non-pharmacologic intervention is evidence-based for managing cancer-related fatigue?

Strict caloric restriction
Aerobic exercise (Correct answer)
Prolonged bed rest
High-dose vitamin C supplementation

Correct answer: Aerobic exercise

Moderate aerobic exercise is the most evidence-based intervention for cancer-related fatigue, improving energy and quality of life.

Question 59: What cumulative dose of doxorubicin is associated with the greatest risk of cardiomyopathy?

200 mg/m²
750 mg/m²
450–550 mg/m² (Correct answer)
100 mg/m²

Correct answer: 450–550 mg/m²

Cardiotoxicity from doxorubicin significantly increases when the cumulative dose exceeds 450–550 mg/m².

Question 60: Which action demonstrates the oncology nurse's understanding of safe handling of oral chemotherapy agents at home?

Teach the patient to wear gloves when handling tablets and store them away from children (Correct answer)
Instruct the patient that oral agents can be split or crushed to ease swallowing
Tell the patient that oral chemotherapy is safer than IV chemotherapy and requires no special precautions
Advise the patient to store medications in a pillbox with other daily medications

Correct answer: Teach the patient to wear gloves when handling tablets and store them away from children

Oral chemotherapy agents are hazardous drugs requiring PPE during handling and safe storage away from others, especially children.

Question 61: Bisphosphonates such as zoledronic acid are used in oncology to treat which complications?

Liver metastases
Bone metastases, hypercalcemia of malignancy, and osteoporosis prevention (Correct answer)
Brain metastases
Lymphedema

Correct answer: Bone metastases, hypercalcemia of malignancy, and osteoporosis prevention

Zoledronic acid inhibits osteoclast activity to reduce skeletal-related events from bone metastases and treat hypercalcemia of malignancy.

Question 62: Immune checkpoint inhibitors such as nivolumab work by blocking which protein to restore T-cell function?

HER2
PD-1 (programmed death-1) (Correct answer)
LAG-3 only
CTLA-4 only

Correct answer: PD-1 (programmed death-1)

Nivolumab is an anti-PD-1 antibody that blocks the PD-1 checkpoint, preventing tumor cells from suppressing T-cell immune responses.

Question 63: A patient completing chemotherapy asks when their hair will return. The nurse's best evidence-based response is:

Hair loss is permanent for all chemotherapy patients
Hair may never return after any chemotherapy
Most patients see hair regrowth within 3–6 months after chemotherapy ends (Correct answer)
Hair will return within 2 weeks of the last dose

Correct answer: Most patients see hair regrowth within 3–6 months after chemotherapy ends

Hair typically begins to regrow within 3–6 months after chemotherapy ends, though texture and color may initially differ from pre-treatment hair.

Question 64: What is the purpose of using a CVAD (central venous access device) for chemotherapy?

To improve oral bioavailability
To safely administer vesicants and reduce peripheral vein damage (Correct answer)
To allow the patient to go home sooner
To reduce drug costs

Correct answer: To safely administer vesicants and reduce peripheral vein damage

CVADs provide reliable venous access for vesicant infusions, protecting peripheral veins and reducing extravasation risk.

Question 65: Adaptive or particular immunity is demonstrated by:

A cell-mediated response (Correct answer)
Large lymphocyte production
An inflammatory response
Acute-phase protein production

Correct answer: A cell-mediated response

Adaptive immunity, also known as acquired or specific immunity, is characterized by its ability to recognize specific pathogens and mount a targeted, memory-based response. A cell-mediated response, primarily involving T-lymphocytes, is a hallmark of this system, directly attacking infected cells or coordinating other immune cells. This differs from innate immunity, which includes non-specific responses like acute-phase protein production and inflammation.

Question 66: Which of the following best prevents tumor lysis syndrome in high-risk patients starting chemotherapy?

Immediate plasmapheresis
Allopurinol or rasburicase plus aggressive IV hydration (Correct answer)
Prophylactic potassium supplementation
Restricting IV fluids to prevent fluid overload

Correct answer: Allopurinol or rasburicase plus aggressive IV hydration

Allopurinol (or rasburicase for very high-risk cases) combined with aggressive IV hydration is the standard prophylaxis for TLS in high-risk patients.

Question 67: A neutropenic patient with fever should receive empiric broad-spectrum antibiotics within:

4 hours of presentation
1 hour of presentation (Correct answer)
6 hours of presentation
24 hours of presentation

Correct answer: 1 hour of presentation

Current guidelines recommend initiating empiric IV antibiotics within 1 hour of presentation in febrile neutropenia to reduce morbidity and mortality.

Question 68: Which process allows cancer cells to invade surrounding tissues by breaking down the extracellular matrix?

Increased cell adhesion
Matrix metalloproteinase (MMP) secretion (Correct answer)
Upregulation of E-cadherin
Decreased VEGF production

Correct answer: Matrix metalloproteinase (MMP) secretion

Cancer cells secrete matrix metalloproteinases (MMPs) that degrade the basement membrane and extracellular matrix, enabling local invasion and metastasis.

Question 69: Which mechanism explains why cancer cells continue to divide without responding to normal growth-stop signals?

Insensitivity to antigrowth signals (dysregulation of tumor suppressor pathways) (Correct answer)
Increased nutrient intake
Overproduction of hormones
Overactivation of apoptosis

Correct answer: Insensitivity to antigrowth signals (dysregulation of tumor suppressor pathways)

Loss of tumor suppressor gene function (e.g., RB, p53) removes the normal brake on cell division, allowing cancer cells to ignore antigrowth signals.

Question 70: Hormonal therapy with tamoxifen is most appropriate for which breast cancer receptor profile?

Estrogen receptor-positive (Correct answer)
HER2-positive, ER-negative
Triple-negative
PR-negative, ER-negative

Correct answer: Estrogen receptor-positive

Tamoxifen is a selective estrogen receptor modulator (SERM) used in estrogen receptor-positive breast cancers.

Question 71: Which assessment tool is validated specifically for measuring overall symptom burden in cancer patients?

Mini-Mental State Examination
CAGE questionnaire
Braden Scale
Edmonton Symptom Assessment System (ESAS) (Correct answer)

Correct answer: Edmonton Symptom Assessment System (ESAS)

The Edmonton Symptom Assessment System (ESAS) measures 9–10 common cancer symptoms using 0–10 scales and is validated for oncology populations.

Question 72: Which assessment tool is recommended by ONS for routine screening of cancer symptom burden?

Confusion Assessment Method (CAM)
Glasgow Coma Scale
Edmonton Symptom Assessment System (ESAS) (Correct answer)
APACHE II Score

Correct answer: Edmonton Symptom Assessment System (ESAS)

The Edmonton Symptom Assessment System (ESAS) is a validated, multi-symptom tool widely endorsed for routine oncology symptom screening.

Question 73: A patient receiving irinotecan develops profuse diarrhea within 24 hours of infusion. This is best managed with:

Octreotide
Atropine (Correct answer)
Loperamide
Metoclopramide

Correct answer: Atropine

Early-onset diarrhea with irinotecan is cholinergic in nature and is treated with atropine.

Question 74: A breast cancer survivor asks if she can use herbal supplements during follow-up care. The nurse's best response is:

Supplements only matter during active chemotherapy
Supplements are never safe after cancer treatment
All herbal supplements are safe for cancer survivors
Always discuss supplements with your oncologist because some can interact with cancer treatments (Correct answer)

Correct answer: Always discuss supplements with your oncologist because some can interact with cancer treatments

Many herbal supplements interact with hormonal therapies or have estrogenic activity; oncologist review before use is essential in breast cancer survivors.

Question 75: Which tumor marker is most specific for monitoring colorectal cancer recurrence?

Alpha-fetoprotein (AFP)
Carcinoembryonic antigen (CEA) (Correct answer)
CA-125
PSA

Correct answer: Carcinoembryonic antigen (CEA)

CEA is the most widely used tumor marker for monitoring colorectal cancer response to treatment and surveillance for recurrence after resection.

Question 76: The OCN certification must be renewed how often?

Every 5 years
Every 4 years (Correct answer)
Every 2 years
Every year

Correct answer: Every 4 years

OCN certification is valid for 4 years and must be renewed through continuing education or retesting.

Question 77: Which laboratory finding is NOT consistent with tumor lysis syndrome?

Hypercalcemia (Correct answer)
Hyperphosphatemia
Hyperkalemia
Hyperuricemia

Correct answer: Hypercalcemia

TLS causes hypocalcemia (not hypercalcemia) because phosphate released from lysed cells binds calcium, lowering serum levels.

Question 78: What is the primary goal of palliative care in oncology?

To replace all active cancer treatment
To provide curative treatment
To improve quality of life by managing symptoms and psychosocial needs (Correct answer)
To hasten death in terminal patients

Correct answer: To improve quality of life by managing symptoms and psychosocial needs

Palliative care focuses on relieving suffering and improving quality of life for patients and families, and can be delivered alongside curative treatment.

Question 79: The immune system recognizes cancer cells through a process called immune surveillance. Which cells are the primary cancer-killing effectors?

B lymphocytes exclusively
Cytotoxic T lymphocytes (CD8+ T cells) and natural killer (NK) cells (Correct answer)
Eosinophils and basophils
Platelets and red blood cells

Correct answer: Cytotoxic T lymphocytes (CD8+ T cells) and natural killer (NK) cells

CD8+ cytotoxic T cells and NK cells are the primary immune effectors that recognize and destroy cancer cells expressing tumor-associated antigens.

Question 80: Which assessment is essential before providing cancer patient education to ensure effectiveness?

Whether the patient has internet access
Family member's educational background
Patient's insurance coverage
Patient's readiness to learn, health literacy, preferred learning style, and language (Correct answer)

Correct answer: Patient's readiness to learn, health literacy, preferred learning style, and language

Effective patient education begins with assessing readiness to learn, health literacy, language, and preferred learning style to tailor teaching appropriately.

Question 81: Which laboratory value is most critical to assess before administering methotrexate?

Serum sodium
Serum creatinine (Correct answer)
Platelet count
Serum potassium

Correct answer: Serum creatinine

Methotrexate is renally excreted, and impaired renal function can lead to toxic drug accumulation.

Question 82: Before administering paclitaxel, the nurse should premedicate with which agents to prevent hypersensitivity reactions?

Acetaminophen and ibuprofen
Metoclopramide and dexamethasone
Corticosteroids, diphenhydramine, and an H2 blocker (Correct answer)
Ondansetron and lorazepam

Correct answer: Corticosteroids, diphenhydramine, and an H2 blocker

Paclitaxel's Cremophor EL solvent causes hypersensitivity reactions; premedication with a steroid, antihistamine, and H2 blocker is required.

Question 83: What does the term 'nadir' refer to in chemotherapy nursing?

The lowest point of blood cell counts after chemotherapy (Correct answer)
The point of maximum tumor shrinkage
The highest point of nausea after infusion
The peak drug concentration in the blood

Correct answer: The lowest point of blood cell counts after chemotherapy

Nadir is the period of lowest blood counts, typically 7–14 days after chemotherapy, when infection risk is greatest.

Question 84: A patient with multiple myeloma presents with confusion, polyuria, and constipation. Serum calcium is 13.5 mg/dL. The priority nursing intervention is:

Initiate aggressive IV hydration with normal saline (Correct answer)
Administer oral calcium supplements
Restrict fluid intake
Administer IV bisphosphonates immediately

Correct answer: Initiate aggressive IV hydration with normal saline

Aggressive IV hydration with normal saline is the first-line treatment for hypercalcemia of malignancy to dilute calcium and promote renal excretion.

Question 85: Cognitive changes after chemotherapy, commonly called 'chemo brain,' are best described as:

Complete memory loss
Difficulties with memory, concentration, and processing speed (Correct answer)
Permanent dementia in all patients
Psychosis and hallucinations

Correct answer: Difficulties with memory, concentration, and processing speed

Chemo-related cognitive impairment (CRCI) typically manifests as subtle difficulties with attention, short-term memory, and processing speed that may improve over time.

Question 86: Which type of gene mutation is found in the germline and can be inherited by offspring?

Somatic mutation (acquired)
Silent mutation only
Frameshift mutation only
Germline mutation (hereditary) (Correct answer)

Correct answer: Germline mutation (hereditary)

Germline mutations are present in all cells of the body from birth and can be passed to children, as seen with BRCA1/2 and Lynch syndrome mutations.

Question 87: Which of the following is a common dose-limiting toxicity of cisplatin?

Hepatotoxicity
Cardiotoxicity
Nephrotoxicity (Correct answer)
Pulmonary fibrosis

Correct answer: Nephrotoxicity

Cisplatin causes significant nephrotoxicity; aggressive hydration and amifostine may be used to minimize renal damage.

Question 88: Which of the following is a cell-cycle-specific chemotherapy agent?

Cisplatin
Cyclophosphamide
Vincristine (Correct answer)
Carmustine

Correct answer: Vincristine

Vincristine is cell-cycle-specific, acting in the M phase by binding to tubulin and preventing spindle formation.

Question 89: Which type of biopsy provides the least invasive tissue diagnosis for accessible superficial tumors?

Fine needle aspiration (FNA) (Correct answer)
Excisional biopsy
Incisional biopsy
Open surgical biopsy

Correct answer: Fine needle aspiration (FNA)

Fine needle aspiration uses a thin needle to withdraw cells from a mass with minimal invasion and no general anesthesia, making it the least invasive biopsy technique.

Question 90: What does fractionation in radiation therapy mean?

Using multiple radiation beams from different angles simultaneously
Dividing the total radiation dose into smaller doses given over multiple sessions (Correct answer)
Targeting only a fraction of the tumor volume per treatment
Delivering radiation in pulses rather than a continuous beam

Correct answer: Dividing the total radiation dose into smaller doses given over multiple sessions

Fractionation divides the total prescribed radiation dose into multiple smaller fractions delivered over days or weeks to allow normal tissue repair between treatments.

Question 91: CAR-T cell therapy works by:

Delivering radiation to tumor cells via antibodies
Blocking checkpoint proteins on T cells
Genetically engineering patient T cells to recognize and kill cancer cells (Correct answer)
Stimulating NK cells with cytokines

Correct answer: Genetically engineering patient T cells to recognize and kill cancer cells

CAR-T therapy collects a patient's T cells, engineers them to express chimeric antigen receptors targeting cancer antigens, and reinfuses them.

Question 92: The 'teachback' method in patient education is best described as:

Showing a video and asking if they have questions
Asking the patient to explain the information back in their own words to confirm understanding (Correct answer)
Reading written instructions aloud to the patient
Testing the patient with a multiple-choice quiz

Correct answer: Asking the patient to explain the information back in their own words to confirm understanding

Teach-back is an evidence-based health literacy technique where the nurse asks the patient to restate information to verify comprehension before discharge.

Question 93: A patient with known lung cancer develops distant heart sounds, jugular venous distension, and hypotension. The nurse suspects:

Myocardial infarction
Cardiac tamponade (Correct answer)
Pulmonary embolism
Heart failure exacerbation

Correct answer: Cardiac tamponade

Beck's triad (muffled heart sounds, JVD, hypotension) is classic for cardiac tamponade, which can result from malignant pericardial effusion.

Question 94: The nurse is caring for a patient with hypercalcemia of malignancy. Which symptom would the nurse expect to assess?

Bradycardia and prolonged QT interval
Muscle cramps and positive Trousseau sign
Stridor and laryngospasm
Confusion, polyuria, constipation, and fatigue (Correct answer)

Correct answer: Confusion, polyuria, constipation, and fatigue

Hypercalcemia of malignancy classically presents with confusion, polyuria, constipation, anorexia, and profound fatigue.

Question 95: PARP inhibitors such as olaparib are most effective in cancers with defects in which pathway?

RAS/MAPK signaling pathway
VEGF signaling pathway
Homologous recombination repair (BRCA1/2 mutations) (Correct answer)
PI3K/AKT/mTOR pathway

Correct answer: Homologous recombination repair (BRCA1/2 mutations)

PARP inhibitors exploit synthetic lethality in BRCA-mutated cells that cannot repair DNA through homologous recombination, leading to cancer cell death.

Question 96: What is the correct action if extravasation of a vesicant chemotherapy agent is suspected?

Flush the IV line rapidly with saline
Increase the infusion rate to dilute the drug
Stop the infusion immediately and leave the needle in place (Correct answer)
Apply heat to the site to promote absorption

Correct answer: Stop the infusion immediately and leave the needle in place

The infusion must be stopped immediately and the needle left in place so residual drug can be aspirated before further intervention.

Question 97: Which oncogene is frequently amplified in HER2-positive breast cancer, making it a therapeutic target?

MYC
KRAS
ERBB2 (HER2/neu) (Correct answer)
BCL-2

Correct answer: ERBB2 (HER2/neu)

ERBB2 gene amplification produces excess HER2 protein on the cell surface, driving uncontrolled cell proliferation in HER2-positive breast cancer.

Question 98: Which staging system is most commonly used to stage solid tumors in oncology practice?

TNM Classification (Correct answer)
Rai staging
FIGO staging
Ann Arbor Classification

Correct answer: TNM Classification

The TNM (Tumor, Node, Metastasis) classification system is the universally accepted standard for staging most solid tumors and guides treatment planning.

Question 99: Which chemotherapy agent is associated with hemorrhagic cystitis as a major side effect?

Vinorelbine
Irinotecan
Cisplatin
Cyclophosphamide (Correct answer)

Correct answer: Cyclophosphamide

Cyclophosphamide's metabolite acrolein irritates the bladder lining, causing hemorrhagic cystitis; mesna and hydration are used for prevention.

Question 100: Spinal cord compression in oncology patients most commonly presents initially with:

Sensory loss only
Complete paralysis
Back pain (Correct answer)
Bowel and bladder incontinence

Correct answer: Back pain

Back pain is the earliest and most common presenting symptom of malignant spinal cord compression, often preceding neurologic deficits.

Question 101: Which psychosocial issue is most commonly reported by long-term cancer survivors?

Indifference about follow-up care
Complete return to pre-cancer psychological baseline
Post-traumatic growth only
Fear of recurrence (Correct answer)

Correct answer: Fear of recurrence

Fear of cancer recurrence is the most commonly reported psychosocial concern among cancer survivors and can significantly impair quality of life.

Question 102: Palliative sedation is defined as:

Using benzodiazepines to treat chemotherapy anxiety
Routine sedation for procedures
Administering opioids to hasten death
Intentionally reducing consciousness to relieve refractory suffering at end of life (Correct answer)

Correct answer: Intentionally reducing consciousness to relieve refractory suffering at end of life

Palliative sedation is the monitored use of sedating medications to reduce consciousness in terminally ill patients with refractory, intractable suffering.

Question 103: What is the term for giving chemotherapy before the primary surgical procedure to shrink a tumor?

Adjuvant therapy
Consolidation therapy
Neoadjuvant therapy (Correct answer)
Salvage therapy

Correct answer: Neoadjuvant therapy

Neoadjuvant therapy is given before surgery to reduce tumor size and potentially allow for less extensive surgical resection.

Question 104: Which of the following best describes the action of monoclonal antibodies used in cancer immunotherapy?

Block all cell division non-selectively
Replace deficient white blood cells in the bone marrow
Directly alkylate DNA to halt replication
Target specific antigens on cancer cells to trigger immune destruction (Correct answer)

Correct answer: Target specific antigens on cancer cells to trigger immune destruction

Monoclonal antibodies bind to specific antigens expressed on cancer cells, flagging them for destruction by the immune system.

Question 105: Which intervention is most appropriate when a patient develops chemotherapy extravasation of a vesicant agent?

Apply warm compresses and continue the infusion at a slower rate
Discontinue the IV and massage the affected area vigorously
Flush the IV line with normal saline and apply a warm compress
Stop the infusion immediately, aspirate residual drug, and apply cold compresses for most vesicants (Correct answer)

Correct answer: Stop the infusion immediately, aspirate residual drug, and apply cold compresses for most vesicants

For vesicant extravasation, the infusion must be stopped immediately, residual drug aspirated, the IV removed, and cold compresses applied (except for vinca alkaloids which require warmth).

Question 106: A patient receiving bleomycin should be monitored closely for which life-threatening complication?

Pulmonary fibrosis (Correct answer)
Hepatic veno-occlusive disease
Renal failure
Cardiac arrhythmia

Correct answer: Pulmonary fibrosis

Bleomycin can cause pulmonary fibrosis and pneumonitis; cumulative dose limits and pulmonary function monitoring are essential.

Question 107: A patient with newly diagnosed cancer refuses to discuss prognosis with the physician, saying 'Just tell my wife everything.' How should the nurse respond?

Override the patient's wishes because the prognosis affects treatment decisions
Immediately share all information with the spouse
Respect the patient's expressed preference to have the spouse receive information, and document this preference (Correct answer)
Insist the patient hear the information directly

Correct answer: Respect the patient's expressed preference to have the spouse receive information, and document this preference

Patient autonomy includes the right to delegate information-sharing; the nurse should honor and document this preference while ensuring the designated person is properly informed.

Question 108: A patient with advanced cancer reports existential distress, stating 'I feel like my life has had no meaning.' Which nursing response best reflects a palliative care approach?

'Try not to think about it and focus on positive things.'
'Would you like me to arrange for a chaplain or counselor to speak with you?' (Correct answer)
'You should speak to your oncologist about antidepressants.'
'This is normal at this stage — everyone feels this way.'

Correct answer: 'Would you like me to arrange for a chaplain or counselor to speak with you?'

Palliative care addresses spiritual and existential distress; offering a chaplain or counselor validates the patient's experience and connects them with appropriate support.

Question 109: Which dietary recommendation is evidence-based for cancer survivors to reduce recurrence risk?

Plant-forward diet rich in vegetables, fruits, and whole grains, limiting processed meats (Correct answer)
Daily megadose antioxidant supplements
Elimination of all carbohydrates
High-protein meat-only diet

Correct answer: Plant-forward diet rich in vegetables, fruits, and whole grains, limiting processed meats

Major cancer organizations recommend a plant-rich, minimally processed diet that limits red and processed meats to reduce cancer recurrence risk.

Question 110: Financial toxicity in oncology refers to:

Medications that cause liver damage affecting financial decision-making
Overprescribing of expensive medications
Hospital billing errors that harm patients financially
The negative financial burden experienced by patients due to cancer treatment costs, affecting well-being and adherence (Correct answer)

Correct answer: The negative financial burden experienced by patients due to cancer treatment costs, affecting well-being and adherence

Financial toxicity describes the economic harm caused by cancer treatment costs — including medical bills, lost wages, and out-of-pocket expenses — which can lead to non-adherence and poor outcomes.

Question 111: A patient receiving cisplatin needs prehydration primarily to prevent which toxicity?

Hepatotoxicity
Pulmonary toxicity
Cardiotoxicity
Nephrotoxicity (Correct answer)

Correct answer: Nephrotoxicity

Cisplatin is highly nephrotoxic, and aggressive IV hydration before and after administration is required to protect renal function.

Question 112: A patient receiving external beam radiation develops brisk erythema and moist desquamation. This is classified as what grade of acute skin toxicity per CTCAE?

Grade 2
Grade 4
Grade 1
Grade 3 (Correct answer)

Correct answer: Grade 3

Moist desquamation is CTCAE Grade 3 radiation dermatitis, requiring wound care and possible treatment interruption.

Question 113: What is the nadir in the context of chemotherapy administration?

The first day of a new chemotherapy cycle
The cumulative lifetime dose limit
The peak drug concentration in blood
The point of lowest blood cell counts after chemotherapy (Correct answer)

Correct answer: The point of lowest blood cell counts after chemotherapy

The nadir is the lowest point of blood counts (especially neutrophils) following chemotherapy, typically occurring 7–14 days after treatment.

Question 114: Which chemotherapy agent is classified as a vesicant and requires careful monitoring for extravasation?

Cyclophosphamide
Fluorouracil
Methotrexate
Vincristine (Correct answer)

Correct answer: Vincristine

Vincristine is a vesicant that can cause severe tissue necrosis if it extravasates from the vein.

Question 115: Which of the following is the primary mechanism of action of alkylating agents used in chemotherapy?

Inhibiting microtubule polymerization
Cross-linking DNA strands to prevent replication (Correct answer)
Blocking hormonal receptor sites
Inhibiting topoisomerase enzymes

Correct answer: Cross-linking DNA strands to prevent replication

Alkylating agents work by forming covalent bonds with DNA, cross-linking strands and preventing cell replication.

Question 116: The Warburg effect in cancer cells refers to which metabolic phenomenon?

Decreased glucose uptake by cancer cells
Preferential use of aerobic glycolysis even in the presence of oxygen (Correct answer)
Preferential use of fatty acids for energy
Increased oxidative phosphorylation exclusively

Correct answer: Preferential use of aerobic glycolysis even in the presence of oxygen

The Warburg effect describes how cancer cells preferentially use glycolysis (even with oxygen present) to meet their high energy and biosynthetic demands.

Question 117: Neutropenic fever in a cancer patient is defined as a single oral temperature ≥38.3°C (101°F) or ≥38°C (100.4°F) for 1 hour AND an ANC of:

< 100 cells/mm³
< 1500 cells/mm³
< 500 cells/mm³ (Correct answer)
< 1000 cells/mm³

Correct answer: < 500 cells/mm³

IDSA guidelines define neutropenic fever as fever with an ANC <500 cells/mm³, or <1000 cells/mm³ with expected decline to <500.

Question 118: Which of the following nursing interventions is the primary area of attention for the client with terminal lung cancer in terms of nursing care?

Prepare client's will
Provide emotional support
Provide pain control (Correct answer)
Provide nutritional support

Correct answer: Provide pain control

For a patient with terminal lung cancer, pain is often a pervasive and debilitating symptom that significantly impacts their quality of life. Therefore, providing effective pain control is the primary nursing intervention, as it directly addresses the patient's comfort and well-being. While emotional and nutritional support are important, managing physical suffering takes precedence in end-of-life care for this condition.

Question 119: Which statement best describes intensity-modulated radiation therapy (IMRT)?

Uses radioactive isotopes implanted directly into the tumor
Delivers a uniform radiation dose across the entire treatment field
Delivers a single high-dose fraction using a Gamma Knife device
Modulates the intensity of individual radiation beamlets to conform precisely to tumor shape while sparing adjacent organs (Correct answer)

Correct answer: Modulates the intensity of individual radiation beamlets to conform precisely to tumor shape while sparing adjacent organs

IMRT uses computer-controlled modulation of beam intensity across multiple beamlets to sculpt the dose distribution around the tumor and minimize dose to nearby critical structures.

Question 120: One of the primary tumors with the most significant frequency of brain metastases is:

Melanoma (Correct answer)
Ovarian cancer
Thyroid cancer
Non-Hodgkin's lymphoma

Correct answer: Melanoma

Melanoma is notoriously aggressive and has a high propensity to metastasize to distant sites, with the brain being one of the most common and challenging locations. Among primary tumors, melanoma is recognized as having one of the highest frequencies of brain metastases, often leading to significant neurological complications. This makes it a critical consideration in the staging and management of melanoma patients.

Question 121: Which agent is used as antidote or reversal for severe methotrexate toxicity when leucovorin is insufficient?

N-acetylcysteine
Glucarpidase (carboxypeptidase G2) (Correct answer)
Mesna
Dexrazoxane

Correct answer: Glucarpidase (carboxypeptidase G2)

Glucarpidase rapidly converts methotrexate to inactive metabolites in the plasma, used when methotrexate levels remain dangerously high despite leucovorin rescue.

Question 122: Which chemotherapy agent is classified as an alkylating agent?

Doxorubicin
Vincristine
Cyclophosphamide (Correct answer)
Methotrexate

Correct answer: Cyclophosphamide

Cyclophosphamide is an alkylating agent that works by cross-linking DNA strands to prevent cell replication.

Question 123: "I knew lymphedema could happen, but I never dreamed it would happen to me," a breast cancer survivor sobs. The nurse's first line of defense is to:

Assure the patient that the lymphedema will resolve quickly.
Teach the patient ways to reduce the risk of recurrence of the lymphedema.
Take a recent history to identify the cause of the lymphedema.
Allow the patient to express her feelings. (Correct answer)

Correct answer: Allow the patient to express her feelings.

When a patient expresses strong emotions like sadness and disbelief, the nurse's initial priority is to provide emotional support and validate their feelings. Allowing the patient to express her feelings demonstrates empathy, builds trust, and helps the patient process the emotional impact of the diagnosis. While education and history taking are important, they should follow after addressing the immediate emotional distress.

Question 124: Which chemotherapy drug requires leucovorin rescue to prevent life-threatening toxicity?

Paclitaxel
High-dose methotrexate (Correct answer)
Gemcitabine
Doxorubicin

Correct answer: High-dose methotrexate

Leucovorin (folinic acid) rescue is used after high-dose methotrexate to protect normal cells from folate depletion toxicity.

Question 125: Which CBC finding is most important to monitor in a patient receiving pelvic radiation therapy?

Elevated white blood cell count
Elevated eosinophil count
Thrombocytosis
Decreased hemoglobin, white blood cells, and platelets (Correct answer)

Correct answer: Decreased hemoglobin, white blood cells, and platelets

Pelvic radiation affects the bone marrow in pelvic bones, leading to myelosuppression with decreases in red cells, white cells, and platelets.

Question 126: Trastuzumab (Herceptin) is indicated for cancers that overexpress which receptor?

HER2 (human epidermal growth factor receptor 2) (Correct answer)
Progesterone receptor (PR)
Estrogen receptor (ER)
Androgen receptor (AR)

Correct answer: HER2 (human epidermal growth factor receptor 2)

Trastuzumab is a monoclonal antibody that targets HER2-overexpressing cancers, most commonly HER2+ breast and gastric cancers.

Question 127: What is the primary mechanism of action of taxanes such as paclitaxel?

DNA cross-linking
Stabilizing microtubules to prevent mitosis (Correct answer)
Inhibiting topoisomerase II
Blocking folate metabolism

Correct answer: Stabilizing microtubules to prevent mitosis

Taxanes like paclitaxel stabilize microtubules, preventing their disassembly and thus blocking cell division.

Question 128: EGFR inhibitors such as erlotinib are most effective in NSCLC patients who have which characteristic?

ALK rearrangement
KRAS mutation
PD-L1 negative status
Activating EGFR mutation (Correct answer)

Correct answer: Activating EGFR mutation

Activating mutations in the EGFR gene (exons 19 and 21) predict sensitivity to EGFR tyrosine kinase inhibitors in non-small cell lung cancer.

Question 129: A nurse is preparing to administer rituximab infusion. Which pre-medication is typically given to reduce infusion reactions?

Acetaminophen and diphenhydramine (Correct answer)
Lorazepam and morphine
Epinephrine and hydrocortisone
Ondansetron and dexamethasone only

Correct answer: Acetaminophen and diphenhydramine

Acetaminophen and diphenhydramine are standard pre-medications before rituximab to reduce fever and hypersensitivity infusion reactions.

Question 130: A nurse is caring for a patient with cancer-related fatigue. Which recommendation is most evidence-based?

Recommend high-dose vitamin C supplementation
Encourage a structured, moderate aerobic exercise program (Correct answer)
Complete bed rest throughout treatment
Avoid all physical activity until treatment ends

Correct answer: Encourage a structured, moderate aerobic exercise program

Evidence consistently supports moderate aerobic exercise as the most effective intervention for cancer-related fatigue during and after treatment.

Question 131: Doxorubicin has a cumulative lifetime dose limit primarily because of which toxicity?

Nephrotoxicity
Neurotoxicity
Hepatotoxicity
Cardiomyopathy (Correct answer)

Correct answer: Cardiomyopathy

Doxorubicin accumulates in cardiac tissue and can cause irreversible cardiomyopathy; the total lifetime dose is capped at 450–550 mg/m².

Question 132: Which factor most significantly increases a patient's risk for developing anthracycline-induced cardiotoxicity?

Administration via continuous IV infusion rather than bolus
Cumulative lifetime dose exceeding recommended thresholds (Correct answer)
Low baseline hemoglobin level
Concurrent use of anti-nausea medications

Correct answer: Cumulative lifetime dose exceeding recommended thresholds

Anthracycline cardiotoxicity is dose-dependent; cumulative doses above thresholds (e.g., doxorubicin >450-550 mg/m²) significantly increase cardiomyopathy risk.

Question 133: A survivor who completed treatment 2 years ago reports fear of recurrence at every follow-up visit. The nurse should:

Dismiss the concern since treatment is complete
Acknowledge the fear, assess its impact on functioning, and refer to psychosocial support if needed (Correct answer)
Tell the patient to stop worrying
Reduce follow-up visit frequency to limit anxiety triggers

Correct answer: Acknowledge the fear, assess its impact on functioning, and refer to psychosocial support if needed

Fear of recurrence is a normal and prevalent survivorship issue; validating the experience and connecting the patient with psychosocial resources is the standard approach.

Question 134: Cytokine release syndrome (CRS) is a potentially life-threatening complication most associated with which therapies?

Oral targeted therapy
Alkylating chemotherapy
CAR-T cell therapy and bispecific antibodies (Correct answer)
Hormone therapy

Correct answer: CAR-T cell therapy and bispecific antibodies

CRS is a systemic inflammatory response caused by massive cytokine release when immune cells are activated by CAR-T cell therapy or bispecific antibodies.

Question 135: Which radiation therapy technique uses multiple precisely aimed beams to deliver a high dose to a small tumor while minimizing exposure to surrounding healthy tissue?

Total body irradiation (TBI)
Intensity-modulated radiation therapy (IMRT)
Stereotactic radiosurgery (SRS) (Correct answer)
3D conformal radiation therapy (3D-CRT)

Correct answer: Stereotactic radiosurgery (SRS)

Stereotactic radiosurgery (SRS) delivers highly precise, high-dose radiation to a small target in a single or few sessions, sparing adjacent normal tissue.

Question 136: Which intervention is most appropriate for a terminally ill patient experiencing refractory dyspnea not relieved by other measures?

High-flow oxygen therapy
Broad-spectrum antibiotics
BiPAP ventilation
Low-dose oral or IV opioids (Correct answer)

Correct answer: Low-dose oral or IV opioids

Low-dose opioids are the most effective pharmacologic treatment for refractory dyspnea in terminal illness, reducing the sensation of breathlessness.

Question 137: What lab value must be assessed before administering methotrexate at high doses?

Liver enzymes only
Creatinine clearance/renal function (Correct answer)
Complete blood count only
Serum calcium

Correct answer: Creatinine clearance/renal function

High-dose methotrexate requires adequate renal clearance to prevent toxic accumulation; creatinine clearance must be assessed before dosing.

Question 138: Which of the following is a sign of increased intracranial pressure (ICP) in a patient with brain metastases?

Hypoglycemia
Peripheral edema
Hypotension and tachycardia
Morning headache, nausea, and papilledema (Correct answer)

Correct answer: Morning headache, nausea, and papilledema

Increased ICP classically presents with morning headache (worse when lying flat), nausea/vomiting, and papilledema on fundoscopic exam.

Question 139: Which of the following is frequently affected when Hodgkin's lymphoma is diagnosed?

Chest
Back
Neck (Correct answer)
Goin

Correct answer: Neck

Hodgkin's lymphoma is a cancer that originates in the lymphatic system, and its most common initial presentation is painless swelling of lymph nodes. The lymph nodes in the neck (cervical region) are frequently the first to be affected and noticed by patients. This characteristic presentation in the neck is a key diagnostic indicator for Hodgkin's lymphoma.

Question 140: During a blood product transfusion, a patient reports chills, back pain, and dark urine 15 minutes into the infusion. The nurse's priority action is to:

Administer diphenhydramine and continue the transfusion
Slow the transfusion rate and observe for improvement
Increase the flow rate to complete the transfusion quickly
Stop the transfusion immediately and maintain IV access with normal saline (Correct answer)

Correct answer: Stop the transfusion immediately and maintain IV access with normal saline

These symptoms indicate an acute hemolytic transfusion reaction; the transfusion must be stopped immediately while IV access is maintained.

Question 141: Secondary malignancies are a long-term risk for cancer survivors primarily because of:

Genetic predisposition only in BRCA carriers
Unhealthy lifestyle choices only
Chemotherapy and radiation damage to normal DNA in healthy tissues (Correct answer)
Age-related degeneration after age 70 only

Correct answer: Chemotherapy and radiation damage to normal DNA in healthy tissues

Alkylating agents and radiation are directly mutagenic to normal cells and increase lifetime risk of secondary malignancies such as therapy-related AML.

Question 142: What is the primary mechanism by which ionizing radiation destroys cancer cells?

Disrupting the cell membrane integrity
Inducing DNA strand breaks that lead to cell death (Correct answer)
Inhibiting protein synthesis in tumor cells
Blocking nutrient supply to the tumor

Correct answer: Inducing DNA strand breaks that lead to cell death

Ionizing radiation damages DNA by causing single- and double-strand breaks, which prevents cancer cells from replicating and leads to apoptosis.

Question 143: Which electrolyte imbalance is most commonly associated with tumor lysis syndrome?

Hypokalemia and hypernatremia
Hyponatremia and hypochloremia
Hyperkalemia, hyperphosphatemia, and hypocalcemia (Correct answer)
Hypercalcemia and hypermagnesemia

Correct answer: Hyperkalemia, hyperphosphatemia, and hypocalcemia

Tumor lysis syndrome releases intracellular contents, causing hyperkalemia, hyperphosphatemia, and hypocalcemia along with hyperuricemia.

Question 144: Which of the following best describes 'breakthrough pain' in cancer patients?

Pain caused by the analgesic medication itself
Transient flares of pain that exceed baseline despite stable around-the-clock analgesia (Correct answer)
Pain that occurs only at night
Baseline persistent pain requiring around-the-clock medication

Correct answer: Transient flares of pain that exceed baseline despite stable around-the-clock analgesia

Breakthrough pain is a transient exacerbation of pain that occurs against a background of otherwise controlled baseline pain.

Question 145: Which type of cancer is most strongly associated with the Philadelphia chromosome (BCR-ABL translocation)?

Multiple myeloma
Chronic myeloid leukemia (CML) (Correct answer)
Acute myeloid leukemia (AML)
Hodgkin lymphoma

Correct answer: Chronic myeloid leukemia (CML)

The Philadelphia chromosome (translocation between chromosomes 9 and 22) creating the BCR-ABL fusion gene is the hallmark of chronic myeloid leukemia.

Question 146: Tumor grade refers to which pathological characteristic?

The presence of distant metastases
How differentiated (similar to normal tissue) the cancer cells appear under microscopy (Correct answer)
The number of lymph nodes involved
The physical size of the tumor

Correct answer: How differentiated (similar to normal tissue) the cancer cells appear under microscopy

Tumor grade reflects the degree of cellular differentiation: low grade (well differentiated) cells look like normal cells, while high grade (poorly differentiated) cells are more abnormal and aggressive.

Question 147: CAR-T cell therapy requires which critical patient preparation step?

High-dose steroid premedication only
Lymphodepleting chemotherapy before infusion (Correct answer)
Complete fasting for 24 hours
Bone marrow biopsy on day of infusion

Correct answer: Lymphodepleting chemotherapy before infusion

Lymphodepleting chemotherapy (conditioning) before CAR-T infusion removes endogenous lymphocytes to create space for the engineered T-cells to expand.

Question 148: Due to severe and incurable pancreatic cancer, a patient was given hospice care and sent home with orders for morphine, lorazepam, and 2 L of oxygen. According to the nurse, which of the following situations poses the most risk to the patient's and the family's safety during the initial home visit?

The are five entrance steps to the home
There is only one bathroom
The patient's wife is smoking in the living room (Correct answer)

Correct answer: The patient's wife is smoking in the living room

The presence of oxygen therapy in the home creates a significant fire hazard, as oxygen is highly combustible. Smoking in the same room as a patient receiving oxygen therapy dramatically increases the risk of a fire or explosion. This poses an immediate and severe threat to the patient's and family's safety, far outweighing other environmental factors.

Question 149: The MASCC risk index is used in oncology to:

Calculate chemotherapy dosing
Identify low-risk febrile neutropenia patients eligible for oral antibiotics (Correct answer)
Stage solid tumors
Predict 5-year survival

Correct answer: Identify low-risk febrile neutropenia patients eligible for oral antibiotics

The MASCC (Multinational Association for Supportive Care in Cancer) score stratifies febrile neutropenia into low vs. high risk, guiding outpatient vs. inpatient management.

Question 150: Which drug requires REMS (Risk Evaluation and Mitigation Strategy) program enrollment due to teratogenicity in oncology?

Filgrastim
Ondansetron
Thalidomide and lenalidomide (Correct answer)
Methotrexate alone

Correct answer: Thalidomide and lenalidomide

Thalidomide and lenalidomide are teratogenic drugs managed under REMS (THALOMID REMS and REVLIMID REMS) requiring pregnancy testing, contraception, and restricted dispensing.

Question 151: Colony-stimulating factors (e.g., filgrastim/G-CSF) are used in oncology patients primarily for which purpose?

To prevent anemia from chemotherapy
To increase platelet counts
To stimulate neutrophil production and reduce febrile neutropenia risk (Correct answer)
To reduce nausea from radiation

Correct answer: To stimulate neutrophil production and reduce febrile neutropenia risk

G-CSF agents like filgrastim stimulate the bone marrow to produce neutrophils, reducing the depth and duration of chemotherapy-induced neutropenia.

Question 152: Which treatment is the immediate priority for a patient with confirmed malignant spinal cord compression?

Radiation therapy
Surgical decompression
High-dose corticosteroids (dexamethasone) (Correct answer)
Chemotherapy

Correct answer: High-dose corticosteroids (dexamethasone)

High-dose dexamethasone is given immediately to reduce spinal cord edema while definitive treatment (radiation or surgery) is arranged.

Question 153: A patient asks the nurse what BRCA1 gene mutation means for their cancer risk. Which response is most accurate?

It guarantees development of breast cancer by age 40
It significantly increases lifetime risk of breast and ovarian cancers (Correct answer)
It has no impact if no family history of cancer exists
It only affects ovarian cancer risk, not breast cancer

Correct answer: It significantly increases lifetime risk of breast and ovarian cancers

BRCA1 mutations significantly elevate lifetime risk for both breast cancer (55–72%) and ovarian cancer (44%), guiding decisions about enhanced surveillance and risk-reduction strategies.

Question 154: Which corticosteroid is most commonly used as part of antiemetic regimens for highly emetogenic chemotherapy?

Dexamethasone (Correct answer)
Methylprednisolone
Hydrocortisone
Prednisone

Correct answer: Dexamethasone

Dexamethasone is the preferred corticosteroid in CINV regimens due to its potency, long half-life, and synergistic antiemetic effect with 5-HT3 antagonists.

Question 155: Which element is essential in a comprehensive cancer survivorship care plan?

Only future treatment plans
List of dietary supplements to take
Summary of treatment received and schedule of recommended follow-up (Correct answer)
Contact information of insurance provider only

Correct answer: Summary of treatment received and schedule of recommended follow-up

A survivorship care plan must include a treatment summary and follow-up schedule so the patient and primary care provider can manage long-term and late effects.

Question 156: An advance directive (living will) in oncology primarily serves to:

Document the patient's wishes for end-of-life care in case they cannot speak for themselves (Correct answer)
Authorize billing for cancer treatments
Assign a healthcare power of attorney
Restrict information sharing with family members

Correct answer: Document the patient's wishes for end-of-life care in case they cannot speak for themselves

A living will is an advance directive that documents a patient's treatment wishes (e.g., CPR, ventilation) in the event they become incapacitated.

Question 157: A patient undergoing pelvic radiation for cervical cancer reports vaginal dryness and dyspareunia. The nurse should recommend:

Increased oral fluid intake
Hormone replacement therapy only
Abstinence from all sexual activity permanently
Vaginal moisturizers and dilator use as prescribed (Correct answer)

Correct answer: Vaginal moisturizers and dilator use as prescribed

Vaginal moisturizers and use of a vaginal dilator help maintain vaginal patency and moisture after pelvic radiation–induced mucosal changes.

Question 158: A patient receiving radiation therapy to the salivary glands develops severe dry mouth. What is this condition called, and which intervention is most appropriate?

Xerostomia; encourage frequent sips of water, use saliva substitutes, and good oral hygiene (Correct answer)
Trismus; prescribe jaw-stretching exercises
Dysphagia; initiate enteral tube feeding immediately
Mucositis; treat with magic mouthwash rinses

Correct answer: Xerostomia; encourage frequent sips of water, use saliva substitutes, and good oral hygiene

Xerostomia (dry mouth) from salivary gland irradiation is managed with saliva substitutes, frequent water intake, and meticulous oral hygiene to prevent dental caries and infection.

Question 159: Which route of administration bypasses the blood-brain barrier most effectively for CNS tumors?

Intravenous
Subcutaneous
Intrathecal (Correct answer)
Oral

Correct answer: Intrathecal

Intrathecal administration delivers chemotherapy directly into the cerebrospinal fluid, bypassing the blood-brain barrier.

Question 160: What is the first-line treatment for opioid-induced constipation in oncology patients?

Increased water intake alone
Enemas as needed only
Stimulant laxative (e.g., senna) with or without a stool softener (Correct answer)
Increased dietary fiber alone

Correct answer: Stimulant laxative (e.g., senna) with or without a stool softener

A stimulant laxative such as senna should be started prophylactically with opioid therapy because opioids suppress bowel motility.

Question 161: Which cancer screening test detects precancerous lesions and is recommended for cervical cancer prevention?

Papanicolaou (Pap) smear and HPV testing (Correct answer)
Chest CT scan
CA-125 blood test
Colonoscopy only

Correct answer: Papanicolaou (Pap) smear and HPV testing

Pap smear and co-testing with HPV detection identify cervical dysplasia before it progresses to invasive cancer, making cervical cancer highly preventable.

Question 162: Disseminated intravascular coagulation (DIC) in cancer is most commonly associated with which malignancy?

Acute promyelocytic leukemia (APL) (Correct answer)
Chronic lymphocytic leukemia
Breast cancer
Multiple myeloma

Correct answer: Acute promyelocytic leukemia (APL)

APL (AML-M3) is classically associated with DIC due to release of procoagulant granules from malignant promyelocytes.

Question 163: Which personal protective equipment (PPE) is required when handling hazardous chemotherapy drugs?

Surgical mask and gown only
N95 mask and gloves
Double gloves, gown, and eye protection (Correct answer)
Single gloves only

Correct answer: Double gloves, gown, and eye protection

NIOSH and ONS guidelines require double chemotherapy-rated gloves, a protective gown, and eye/face protection when handling hazardous drugs.

Question 164: Which hallmark of cancer involves the tumor's ability to grow its own blood supply?

Sustained angiogenesis (Correct answer)
Evading apoptosis
Limitless replicative potential
Self-sufficiency in growth signals

Correct answer: Sustained angiogenesis

Sustained angiogenesis is a hallmark of cancer in which tumors secrete VEGF and other factors to grow new blood vessels that supply nutrients and oxygen.

OCN Oncology Certified Nurse Exam

The OCN (Oncology Certified Nurse) exam is administered by the Oncology Nursing Certification Corporation (ONCC) and validates expert knowledge in oncology nursing practice. The exam covers cancer biology, treatment modalities including chemotherapy and radiation, symptom management, palliative care, oncologic emergencies, patient education, psychosocial care, and pharmacology. Candidates must hold a current RN license and meet clinical practice requirements in oncology nursing.

165

Questions

180 min

Time Limit

70%

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