perithelioma


hemangiopericytoma

 [he-man″je-o-per″ĭ-si-to´-mah] a tumor composed of spindle cells with a rich vascular network, which apparently arises from pericytes.

perithelioma

(pĕr″ĭ-thē-lē-ō′mă) [″ + thele, nipple, + oma, tumor] A tumor derived from the perithelial layer of the blood vessels.