[Perianal streptococcal dermatitis].

Perianal streptococcal dermatitis is a childhood disorder caused by group A beta-hemolytic streptococci which was first described by Amren in 1966. The incidence of this dermatosis, characterized by well defined erythema in the perianal area, has certainly been underestimated and to the authors' knowledge there have still been no reports of this pathology in Italy. Perianal streptococcal dermatitis merits attention given that affected subjects do not always receive appropriate treatment and on average there is a 6-month lapse between the appearance of symptoms and diagnosis. The authors present two cases which were recently referred to their attention and discuss the methods of contagion, the difficulties of clinical diagnosis, associations with other streptococcal disorders and the treatment of this morbid condition.