bone angiosarcoma (Monarch Disease Ontology entry MONDO_0002617) is a high-grade malignant vascular neoplasm that arises from the bone. It is characterized by the presence of neoplastic cells with endothelial differentiation. Also known as: angiosarcoma (disease) of bone tissue, bone Hemangioendothelial sarcoma, bone angioendothelial sarcoma, bone hemangiosarcoma, bone tissue angiosarcoma (disease), osseous angioendothelial sarcoma, osseous angiosarcoma, osseous hemangiosarcoma.