label: Retiform Hemangioendothelioma
label_lc: retiform hemangioendothelioma
description: A rare, intermediate, locally aggressive and rarely metastasizing blood vessel neoplasm of the skin and subcutaneous tissue that usually affects the distal extremities, most often the leg.  It manifests as a slow-growing red/bluish nodule or plaque and is characterized by the presence of hobnail endothelial cells and formation of arborizing vascular channels.