[he-man″je-o-en″do-the″le-o´mah] a rare, well-differentiated endothelial tumor with an appearance between that of a hemangioma and a sarcoma; sometimes considered to be identical to a hemangiosarcoma.
angioendothelioma
(an'jē-ō-en-dō-thē-lē-ō'mă), A benign or malignant neoplasm arising from vascular endothelium. [angio- + endothelioma]