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Dermatology · Vascular disorders: IgA vasculitis
Sample itemA 7-year-old has palpable purpura on the legs and buttocks, abdominal pain, arthralgia and haematuria after an upper respiratory infection. What is the diagnosis?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
A. Henoch-Schonlein purpura (IgA vasculitis)
IgA vasculitis is a small vessel leukocytoclastic vasculitis with IgA immune complex deposition. Platelet counts are normal, and renal involvement determines prognosis.
Option by option
A. Henoch-Schonlein purpura (IgA vasculitis) (correct)
Correct. Palpable purpura with abdominal and renal features is IgA vasculitis.
B. Kawasaki disease
Kawasaki disease causes prolonged fever and mucocutaneous signs.
C. Meningococcaemia
Meningococcaemia presents with toxic illness and necrotic purpura.
D. Idiopathic thrombocytopenic purpura
ITP has low platelets and nonpalpable purpura.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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