Henoch-Schonlein purpura (HSP) is a systemic vasculitic disorder first reported by Heberden in 1806. The association of purpura and joint pain was described by Schonlein in 1837, who termed it “peliosis rheumatica.” Henoch added a description of four children with skin lesions associated with
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Rai et al. (1999) studied this question.