Adrenal Disorders USMLE Step 1 Practice Question
A 45-year-old woman presents with progressive proximal muscle weakness, easy bruising, and facial plethora. Her BP is 165/95 mmHg. Laboratory studies show hypokalemia and metabolic alkalosis. An overnight dexamethasone suppression test shows cortisol of 18 µg/dL (normal <5 µg/dL after suppression). Which of the following is the most likely diagnosis?
Answer choices
- AThyrotoxicosis
- BCushing syndromeCorrect answer
- CPheochromocytoma
- DAddison disease
- EPrimary hyperaldosteronism
- FHyperthyroidism with secondary hypertension
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