Diabetes Mellitus USMLE Step 1 Practice Question
A 38-year-old woman comes to the clinic because of progressive weight gain, easy bruising, proximal muscle weakness, and irregular menses. Physical examination shows moon facies, abdominal violaceous striae, and a dorsocervical fat pad. Screening confirms hypercortisolism. ACTH is elevated, and high dose dexamethasone suppresses cortisol production. Which of the following is the most likely diagnosis?
Answer choices
- APrimary adrenal insufficiency
- BEctopic ACTH secretion from small cell carcinoma
- CACTH secreting pituitary adenomaCorrect answer
- DAdrenal adenoma
- EExogenous glucocorticoid use
- FHypothyroidism with secondary hypercortisolism
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