Henoch-Schönlein Purpura — RACP Paediatrics MCQ

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EasyRheumatologyHenoch-Schönlein PurpuraRACP Paediatrics

A 6-year-old boy presents with a purpuric rash on the buttocks and lower limbs, arthralgia, colicky abdominal pain, and haematuria. Platelet count and coagulation studies are normal. What is the most likely diagnosis?

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Correct answer: A — Henoch-Schönlein purpura (IgA vasculitis)

Henoch-Schönlein purpura (IgA vasculitis) presents with the classic tetrad of palpable purpura (typically on buttocks and lower limbs), arthritis/arthralgia, abdominal pain, and renal involvement (haematuria, proteinuria). Importantly, the platelet count is normal (distinguishing it from ITP). Most cases are self-limiting but renal function should be monitored for at least 6 months.

Reference: RCH Melbourne – 2024 – Clinical Practice Guidelines: Henoch-Schönlein Purpura