Cutaneous vasculitis.

Cutaneous vasculitis comprises a wide spectrum of clinical syndromes and histopathologic findings which share the common theme of vascular inflammation and changes in the adjacent tissue. This article discusses several types of cutaneous vasculitides including leukocytoclastic vasculitis, Henoch-Schönlein purpura, urticarial vasculitis, livedoid vasculitis, and granulomatous vasculitides. The clinical patterns of these types of vasculitic syndromes as well as associated diseases and histopathology are discussed.