Figure 213

Cutaneous purpura in a patient with Henoch-Schonlein purpura. This clinical appearance could be caused by any of the small vessel vasculitides, and thus is not specific for Henoch-Schonlein purpura. Henoch-Schonlein purpura is the most common small vessel vasculitis in children [7]. In a young child with purpura, nephritis and abdominal pain, the likelihood of Henoch-Schonlein purpura is approximately 80%; however, in an older adult with the same clinical presentation, the likelihood of Henoch-Schonlein purpura is very low and the patient has an approximately 80% chance of having an ANCA-associated vasculitis.

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