Ciprofloxacin-induced hypersensitivity vasculitis.

We describe a patient in whom cutaneous vasculitis appeared after 4 days of ciprofloxacin administration. On clinical examination, papular and purpuric lesions were limited to the left axillary zone of the thorax. Skin biopsy did not show the classic leukocytoclastic image but rather a mononuclear infiltrate of the vessel walls. Except a mild increase in inflammatory parameters, there were neither autoantibodies nor biological abnormalities, and the complement level was normal. These findings suggest that ciprofloxacin-induced vasculitis displays histopathological and serologic heterogeneity.