[Severe allergic cutaneovisceral vasculitis in children. Apropos of 6 cases].

Six children aged between 10 months and 13 years with allergic vasculitis are described. The features they had in common were necrotic skin lesions, involvement of various viscera and signs of hypersensitivity reactions. Histological changes of allergic vasculitis were present in the small vessels of the skin. This condition has features in common with both polyarteritis nodosa and with anaphylactoid purpura. Severe cases that do not respond to corticosteroids may respond to immuno-suppression with cyclophosphamide.