Category: Nephrology / Vasculitis
Henoch-Schonlein Purpura (HSP) is an acute IgA-mediated small-vessel vasculitis, primarily affecting children, characterized by a classic tetrad of palpable purpura, arthritis, abdominal pain, and renal disease.
Approximately 10-20 cases per 100,000 children annually, with higher incidence in East Asia (Source: UpToDate, 2023).
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