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Henoch-Schönlein purpura — USMLE Step 3 MCQ

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HardPediatrics (well-child, chronic management)Henoch-Schönlein purpuraUSMLE Step 3

A 6-year-old boy has palpable purpura on the legs and buttocks, colicky abdominal pain, and ankle arthralgias 2 weeks after an upper respiratory infection. Platelet count is normal. Urinalysis shows microscopic hematuria. Which of the following is the most likely diagnosis?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: E — IgA vasculitis

Palpable purpura with arthralgia, abdominal pain, renal findings, and normal platelets is IgA vasculitis.

Reference: AAP vasculitis clinical guidance: https://www.aap.org/