ADVANCED PATHOPHYSIOLOGY EXAM NEWEST 2026/2027 ACTUAL
EXAM COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) WITH RATIONALES|ALREADY GRADED
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SECTION 1: MULTISYSTEM & ONCOLOGIC DISORDERS (Questions 1-35)
1. A patient with cancer develops cachexia. Which pathophysiological mechanism
is primarily responsible for this wasting syndrome?
A. Increased appetite and decreased metabolism
B. Tumor-induced release of cytokines such as TNF-alpha and IL-6
C. Decreased resting energy expenditure
D. Isolated protein deficiency without fat loss
Correct Answer: B
Rationale: Tumor necrosis factor-alpha (TNF-alpha) and interleukin-6 (IL-6) are
pro-inflammatory cytokines that induce lipolysis and proteolysis, leading to the
muscle wasting and fat loss seen in cancer cachexia. This is a systemic metabolic
effect, not simply a lack of appetite.
2. Which laboratory finding is most characteristic of the syndrome of
inappropriate antidiuretic hormone (SIADH) in a patient with small cell lung
cancer?
A. Serum sodium 130 mEq/L; Serum osmolality 260 mOsm/kg
B. Serum sodium 155 mEq/L; Serum osmolality 310 mOsm/kg
C. Serum potassium 5.5 mEq/L; Serum osmolality 280 mOsm/kg
D. Serum calcium 12 mg/dL; Serum osmolality 295 mOsm/kg
Correct Answer: A
Rationale: SIADH is characterized by euvolemic hyponatremia (serum Na <135)
and low serum osmolality (<280) due to excessive water retention from
inappropriate ADH secretion, often seen in lung malignancies.
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,3. A patient with acute pancreatitis develops a bluish discoloration around the
umbilicus. What is this sign called and what does it indicate?
A. Grey Turner's sign; retroperitoneal bleeding
B. Cullen's sign; intra-abdominal or retroperitoneal hemorrhage
C. Kehr's sign; splenic rupture
D. McBurney's point; appendicitis
Correct Answer: B
Rationale: Cullen's sign (periumbilical ecchymosis) indicates retroperitoneal or
intra-abdominal bleeding. Grey Turner's sign is flank ecchymosis. Both are late
signs of severe hemorrhagic pancreatitis.
4. A patient is diagnosed with stage III breast cancer. The tumor is 5 cm, and
cancer cells are found in 4 ipsilateral axillary lymph nodes. There are no distant
metastases. This staging is based on which system?
A. TNM staging system
B. Ann Arbor staging system
C. Duke's staging system
D. Gleason grading system
Correct Answer: A
Rationale: The TNM (Tumor, Node, Metastasis) system is used for most solid
tumors including breast cancer. The Ann Arbor system is for lymphomas, Duke's
for colorectal, and Gleason for prostate cancer.
5. In oncology, what is the primary difference between grading and staging of a
tumor?
A. Grading refers to the size of the tumor; staging refers to the location.
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,B. Grading refers to the histologic appearance of cells; staging refers to the extent
of spread.
C. Grading refers to the patient's prognosis; staging refers to treatment options.
D. Grading is done via MRI; staging is done via biopsy.
Correct Answer: B
Rationale: Grading evaluates how differentiated the tumor cells are (histologic
appearance) and how aggressively they are likely to behave. Staging evaluates the
anatomic extent of the disease, including size, lymph node involvement, and
metastasis.
6. A patient receiving chemotherapy develops febrile neutropenia. Which lab
value defines this condition?
A. Absolute neutrophil count (ANC) < 500/mm3 with a fever of >38.3°C
B. White blood cell count < 1000/mm3 with a fever of >39°C
C. Platelet count < 50,000/mm3 with a fever of >38°C
D. Hemoglobin < 8 g/dL with a fever of >38.5°C
Correct Answer: A
Rationale: Febrile neutropenia is an oncologic emergency defined as an ANC <
500/mm3 (or < 1000/mm3 with a predicted decline) and a single oral
temperature of >38.3°C or a sustained temperature of >38°C for over 1 hour. It
signals a high risk of life-threatening sepsis.
7. Tumor lysis syndrome (TLS) is an oncologic emergency. Which set of metabolic
abnormalities is classic for TLS?
A. Hyperkalemia, hyperphosphatemia, hypocalcemia, hyperuricemia
B. Hypokalemia, hypophosphatemia, hypercalcemia, hypouricemia
C. Hyperkalemia, hypophosphatemia, hypercalcemia, hypouricemia
D. Hypokalemia, hyperphosphatemia, hypocalcemia, hyperuricemia
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, Correct Answer: A
Rationale: TLS is caused by the rapid breakdown of malignant cells, releasing
intracellular contents. This leads to the classic "triad" of hyperkalemia,
hyperphosphatemia, and hyperuricemia, which subsequently causes secondary
hypocalcemia due to calcium phosphate precipitation.
8. A cancer patient develops sudden-onset dyspnea, pleuritic chest pain, and
tachycardia while sitting still. A D-dimer is elevated. What is the most likely
diagnosis?
A. Superior vena cava syndrome
B. Pulmonary embolism
C. Cardiac tamponade
D. Spinal cord compression
Correct Answer: B
Rationale: Cancer patients are hypercoagulable due to tumor-induced
procoagulant factors. Sudden dyspnea, pleuritic pain, and tachycardia are classic
for pulmonary embolism (PE). Elevated D-dimer supports this, though a CT
angiogram is needed for definitive diagnosis.
9. Superior vena cava syndrome (SVCS) is a medical emergency. Which set of
symptoms is most characteristic?
A. Facial edema, distended neck veins, and dyspnea
B. Unilateral leg swelling, warmth, and erythema
C. Severe headache, visual changes, and hypertension
D. Hemoptysis, stridor, and tracheal deviation
Correct Answer: A
Rationale: SVCS occurs when the superior vena cava is compressed or obstructed
(often by a lung tumor or lymphoma). This causes venous congestion in the head
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