Incidence of leukocytoclastic vasculitis in chronic idiopathic urticaria. Study of 100 cases.

One hundred cases of chronic idiopathic urticaria (CIU) were studied to determine the incidence of leukocytoclastic vasculitis (LV) and the clinical and laboratory data that might indicate its presence. LV was found in 12 patients, none of whom had either clinical or laboratory data to suggest its presence. These results suggest that a small percentage of patients with CIU. 12% in this series, have LV without either clinical or laboratory signs of its existence.