[Oral contraceptives :misunderstood etiology of erythema nodosum (author's transl)].

The cutaneous side effects of oral contraceptives are uncommon but their manifestations are many and varied. Erythema nodosum is rare, it is typical but the associated signs are few and do not permit the etiological diagnosis. The latter rests mainly on the spontaneous disappearance of the symptomatology when the prescription of oral contraceptivae is discontinued and on the relapse on resumption of the retake. The physiopathology, much controversed, causes immunological disorders on the predisposed individual. Only stopping oral contraceptives intake brings about the cure.