Adrenal Disorders USMLE Step 1 Practice Question
A 38-year-old woman presents with a 3-month history of progressive fatigue, weight loss, and orthostatic dizziness. She reports intense salt cravings. On examination, BP is 92/58 mmHg, HR 102/min, and diffuse hyperpigmentation is noted on buccal mucosa and skin creases. Laboratory studies reveal sodium 128 mEq/L, potassium 5.8 mEq/L, and morning cortisol 3 μg/dL. Adrenal CT shows normal adrenal size with no masses. Which of the following is the most likely diagnosis?
Answer choices
- AHyperaldosteronism
- BPheochromocytoma
- CPrimary adrenal insufficiencyCorrect answer
- DSecondary adrenal insufficiency
- ESIADH
- FAdrenocorticotropic hormone-secreting pituitary adenoma
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