An 18-year-old female with anorexia nervosa is found on
routine laboratory examination to be hypokalemic.
Laboratory Studies
Serum sodium 134 mEq/L
Serum potassium 3.1 mEq/L
Serum chloride 92 mEq/L
Serum bicarbonate 31 mEq/L
Blood urea nitrogen 5 mg/dL
Serum creatinine 0.7 mg/dL
Urine chloride 42 mEq/L
24 hour urine calcium 310 mg
Which of the following is the most likely cause of this
patient’s laboratory findings:
A. Laxative abuse
B. Gitelman syndrome
C. Loop diuretic abuse
D. Surreptitious vomiting
E. Thiazide diuretic abuse
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