Small vessel vasculitis of the skin.

Small vessel vasculitis in the skin manifests with palpable purpura on the lower extremities. This clinical presentation prompts a complete physical examination, history, and review of systems, as well as biopsies for routine processing and direct immunofluorescence to confirm the diagnosis. The presence of vasculitis in other organs, associated underlying conditions, and the severity of cutaneous manifestations dictate management. The majority of cases are self-limited, and overall the prognosis is favorable. Still, a subset of patients can have serious complications and chronic or recurrent disease.