[Localized cutaneous infantile myofibromatosis. Apropos of a congenital self-limiting case]

A case of a 8 year girl presenting a congenital tumoral lesion of the lumbar region is reported. Histologically a hamartomatous fibromatosis was found. A review of the literature was made. The final diagnosis was solitary infantile myofibromatosis, cutaneous type (peculiar form of congenital generalized fibromatosis, also named infantile myofibromatosis). Probably this variety is less rare than thought, because biopsies of apparently benign superficial lesions on children are not usually performed.