A Case of Microvenular Hemangioma / 대한피부과학회지

A case of microvenular hemangioma in a 38-year-old female is described. The patient presented with a slowly growing, solitary reddish nodule on Lt. posterior thigh, which measured 1x1 cm. Histologically, the tumor was an infiltrative growth throughout the dermis. It consisted of thin-walled, small sized, irregularly branched vessels. The vascular lumina were narrow. The flattened endothelial cells had oval to spindle-shaped nuclei and scant cytoplasm that were immunohistochemically positive for factor VIII-related antigen and smooth muscle actin. The tumor cells lacked cellular atypia, pleomorphism, and mitotic figures. We diagnosed this case as microvenular hemangioma.