Chronic Kidney Disease USMLE Step 1 Practice Question
A 19-year-old woman presents with progressive muscle cramps and weakness. Vital signs: BP 104/64 mmHg, HR 92/min, RR 16/min, temp 37°C. Labs reveal serum potassium 2.8 mEq/L, pH 7.48, HCO3- 32 mEq/L, magnesium 1.4 mg/dL, and 24-hour urinary calcium 45 mg/day. Urinalysis shows no proteinuria. She denies diarrhea or diuretic use. Which of the following is the most likely diagnosis?
Answer choices
- AType 4 renal tubular acidosis
- BBartter syndrome
- CGitelman syndromeCorrect answer
- DLiddle syndrome
- EPrimary hyperaldosteronism
- FHypokalemic periodic paralysis
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