A 2-month-old female infant presented with a single hemorrhagic crusted papule on the chin present since birth. No visceral involvement could be demonstrated. The lesion involuted spontaneously with scarring in 3 months. Mononuclear cells in the cutaneous infiltrate were Langerhans cells with typical Birbeck granules which positively stained with S-100 protein. This case is the solitary type of congenital self-healing reticulohistiocytosis.
Case Report ; Female ; Histiocytosis, Langerhans-Cell/*congenital/pathology ; Human ; Infant ; Skin Diseases/*congenital/pathology ; Support, Non-U.S. Gov't