Adrenal Disorders USMLE Step 1 Practice Question
A 63 year old man with a 50 pack year smoking history has new hypertension, proximal weakness, and hyperglycemia. Examination shows thin skin and diffuse hyperpigmentation. Serum ACTH is markedly elevated, and both low dose and high dose dexamethasone fail to suppress cortisol. Chest imaging shows a hilar mass. Which of the following is the most likely diagnosis?
Answer choices
- AAdrenal cortical adenoma
- BSmall cell lung carcinoma producing ACTHCorrect answer
- CPituitary corticotroph adenoma
- DPrimary hyperaldosteronism
- EPheochromocytoma
- FLarge cell lung carcinoma producing CRH
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