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Bulimia nervosa — USMLE Step 3 MCQ

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ModeratePsychiatry (outpatient management)Bulimia nervosaUSMLE Step 3

A 21-year-old woman has recurrent binge-eating episodes followed by self-induced vomiting several times weekly for 6 months. BMI is 22 kg/m2, parotid glands are enlarged, enamel is eroded, and potassium is 3.1 mEq/L. Which of the following is the most likely diagnosis?

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Correct answer: E — Bulimia nervosa

Binge eating with compensatory purging at normal BMI, parotid enlargement, enamel erosion, and hypokalemia supports bulimia nervosa.

Reference: DSM-5-TR eating disorder criteria