A large series of 440 patients over a 14-year period presenting with leukocytoclastic vasculitis of the skin 82% had disease limited only to the skin, 12% had HSP, and a small number of cases had an underlying systemic connective tissue disease. Of those with cutaneous disease only, most cases were of unknown cause, 27% were drug-induced, 18% due to bacterial infection, 5% virally induced, and 1% had an underlying malignancy., Cutaneous small vessel vasculitis, Hypersensitivity vasculitis, Immune complex small vessel vasculitis, Hypersensitivity angiitis. Authoritative facts from DermNet New Zealand., Cutaneous vasculitis is inflammation involving capillaries or blood vessels in the skin. Purpura, petechiae, or nodules may be present, as shown in the images below..