Solitary Congenital Indeterminate Cell Histiocytoma / 대한피부과학회지

ABSTRACT

Indeterminate cell proliferations are rarely described in dermatology literature. Indeterminate cells are characterized by positivity for S-100 protein and CD-la, but are distinguished from Langerhans cells by the absence of Birbeck granules. We present a case of congenital indeterminate cell histiocytoma in a 6-day-old male infant. A Skin examination revealed a solitary, erythematous, 6*6cm, superficially crusted, dome shaped papule on his forehead. A Histopathologic examination showed a dense cellular infiltrate in the dermis, below the atrophic epidermis. Frequently, the nucleus demonstrated a single cleft or crease like the shape of a kidney. These cells showed positivity for S-100 protein. Birbeck granules were not found on electron microscopic examination.