A 68-year-old woman comes to the physician because of an enlarging face and abdomen, and thinning of her arms and legs. She has been smoking for 50 years. Serum studies show an elevated ACTH concentration. Administration of high-dose dexamethasone suppresses serum cortisol. What’s the next best step in diagnosis?
Chest x-ray
CT of the abdomen (with contrast)
CT of the abdomen (without contrast)
CT of the chest
Pituitary MRI
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Cut-to-the-chase Answer (0:50):
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HY USMLE Answer (3:09):
