Vascular neoplasm in a newborn male.

Kaposiform hemangioendothelioma was initially described in 1979 and is a rare pediatric vascular tumor that may be associated with Kasabach-Merrit phenomenon. We present a newborn boy who had a large vascular lesion over his left iliac crest without evidence of retroperitoneal involvement or inguinal lymphadenopathy. We briefly review the neoplasm's unique characteristics, histopathology, prognosis, and treatments.