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Henoch-Schonlein purpura is a condition characterized by a widespread necrotizing vasculitis of arterioles and small capillaries.
Classically, children aged 3 to 8 years are affected, boys more than girls,
There are gastrointestinal, joint and renal manifestations.
70% have haematuria and proteinuria, but the glomerulonephritis is often asymptomatic, conferring a good prognosis.