leukocytoclastic vasculitis leu·ko·cy·to·clas·tic vasculitis (l&oomacr;'kə-sī'tə-klās'tĭk)
n.
Acute cutaneous vasculitis that is characterized by purpura, especially of the legs, and by exudation of neutrophils and sometimes fibrin around dermal venules, with extravasation of red blood cells.