Diabetes Mellitus USMLE Step 1 Practice Question
A 34-year-old woman comes to the clinic because of progressive fatigue, salt craving, nausea, and 7-kg unintentional weight loss over 4 months. She has autoimmune thyroid disease. Physical examination shows diffuse hyperpigmentation of the buccal mucosa and palmar creases. Laboratory studies show sodium 128 mEq/L, potassium 5.8 mEq/L, bicarbonate 18 mEq/L, and glucose 64 mg/dL. Which of the following is the most likely diagnosis?
Answer choices
- APrimary hyperaldosteronism
- BPheochromocytoma
- CPrimary adrenal insufficiencyCorrect answer
- DCushing syndrome
- ESecondary adrenal insufficiency
- FBilateral adrenal hemorrhage (Waterhouse-Friderichsen syndrome)
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