A 51-year-old man presents to the GP for a 3-month history of fatigue and 12kg weight loss. He has smoked two packs of cigarettes daily since high school. Physical examination shows central obesity with violaceous striae. His serum potassium is 3.0 (normal range: 3.5-5.0 mEq/L). Which of the following is the most likely explanation for his potassium level?
Cellular exchange
Conn syndrome
Dilutional effect
Distal renal excretion
Insulin resistance
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Cut-to-the-chase Answer (0:30):
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HY USMLE Answer (4:25):
