A 42-year-old man with a history of alcoholism presents to the physician because of a two-month history of increasing weakness, fatigue, and memory loss. Vitals are stable and within normal limits. Serum magnesium is 1.6 mg/dL (NR 1.7-2.2). Which of the following sets of findings is most likely in this patient?
↑ Serum Ca2+; ↑ Serum K+; ↑ Serum PTH
↑ Serum Ca2+; ↑ Serum K+; ↓ Serum PTH
↑ Serum Ca2+; ↓ Serum K+; ↑ Serum PTH
↑ Serum Ca2+; ↓ Serum K+; ↓ Serum PTH
↓ Serum Ca2+; ↑ Serum K+; ↑ Serum PTH
↓ Serum Ca2+; ↑ Serum K+; ↓ Serum PTH
↓ Serum Ca2+; ↓ Serum K+; ↑ Serum PTH
↓ Serum Ca2+; ↓ Serum K+; ↓ Serum PTH
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Cut-to-the-chase Answer (0:57):
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HY USMLE Answer (5:04):
