[Erythrosis interfollicularis colli de Leder].

The authors have studied clinically and histologically two cases of " erythrosis interfollicularis colli de Leder ". It's a frequent affection, principally between 40 and 50 years of age but not very known because the patients rarely consult for it. Clinically they insist on the respect of a triangulary and lozengical median zone, and on the sight in "plucked chicken skin"; histologically on the dilatation of sebaceous glands, the frequency of a folliculary corneous plug and the elastic tissue alterations. On the etiological plan, the part of the age, the sun exposure, and in their two cases on the possible photosensibilisative part of the scents.