[Allergic vasculitis].

Cutaneous allergic vasculitis alone or combined with a systemic condition is of interest to the phlebologist when it occurs in the leg. All the clinical and paraclinical examinations must be oriented towards looking for infection, toxaemia, or even a so-called auto-immune disease. Treatment, although rarely very successful as regards the etiology, includes a considerable range of therapeutic possibilities, e.g. vasculotropic and anti-inflammatory drugs and immunosuppressive chemotherapy, to induce rapid sedation and often definitive cure.