A 38-year-old woman comes to the physician because of an enlarging face and abdomen, and thinning of her arms and legs. Serum studies show an undetectable ACTH concentration and an increased cortisol concentration. Administration of high-dose dexamethasone would most likely result in which of the following?
↑ ACTH; ↑ Cortisol
↑ ACTH; ↔ Cortisol
↑ ACTH; ↓ Cortisol
↔ ACTH; ↑ Cortisol
↔ ACTH; ↔ Cortisol
↔ ACTH; ↓ Cortisol
↓ ACTH; ↑ Cortisol
↓ ACTH; ↔ Cortisol
↓ ACTH; ↓ Cortisol
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Cut-to-the-chase Answer (1:20):
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HY USMLE Answer (7:31):
