[Extragenital lichen sclerosus et atrophicus: about a case].

Lichen sclerosus et atrophicus is a chronic inflammatory dermatosis, characterized by a specific external genital mucosal tissue tropism. Isolated cutaneous manifestation is rare. We report a case of lichen sclerosus et atrophicus in a woman with purely cutaneous involvement, in order to highlight the importance of evoking this diagnosis in the absence of obvious genital involvement.