血管外皮细胞瘤(hemangiopericytoma)是一种来源于毛细血管外皮的较为罕见肿瘤。其特征为梭形瘤细胞,外围有网状纤维分布在单层内皮细胞的血管腔周围,好发于深层组织,如下肢腹膜后和纵隔等处,发生于腮腺者较少见,不为耳鼻咽喉-头 Hemangiopericytoma is a relatively rare tumor derived from the capillaries. It is characterized by spindle tumor cells, the periphery of the reticular fibers distributed in the monolayer of endothelial cells around the lumen, occur in deep tissue, such as the lower limb retroperitoneal and mediastinal, etc., occurred in the parotid less common, not for the nose and mouth Throat - head