Henoch-Schönlein purpura/Hemorrhagic urticaria.

Abstract

Henoch-Schönlein purpura is a vasculitis caused by immune complexes. Besides the skin, the disorder can affect other organs, more frequently joints, kidney and intestine. Its clinical features are polymorphous, although urticaria-like lesions can prevail. Urticaria is a syndrome with multiple etiologic factors, allergic or non allergic, clinically characterized by weals. In children the latter are often followed by hemorrhagic lesions, making the differential diagnosis from Henoch-Schönlein purpura more difficult.