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Pheochromocytoma — USMLE Step 3 MCQ

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ModerateInternal Medicine (chronic management)PheochromocytomaUSMLE Step 3

A 46-year-old woman has episodic palpitations, headache, diaphoresis, and severe hypertension. Plasma free metanephrines are elevated. CT shows a 3-cm adrenal mass. Which of the following is the most likely diagnosis?

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Correct answer: A — Pheochromocytoma

Paroxysmal headache, sweating, palpitations, hypertension, elevated metanephrines, and adrenal mass are classic for pheochromocytoma.

Reference: Endocrine Society pheochromocytoma guideline