obsolete_angiosarcoma true ICDO:9120/3 UMLS:C0018923 MedDRA:10002476 MESH:D006394 malignant hemangioendothelioma sarcoma of blood vessel http://purl.obolibrary.org/obo/MONDO_0016982 hemangiosarcoma, malignant DOID:0001816 malignant angioendothelioma ICD9:171.9 HP:0200058 3.88.0 angiosarcoma SCTID:403977003 ONCOTREE:ANGS hemangiosarcoma NCIT:C3088 Orphanet:263413 angiosarcoma (disease) blood vessel sarcoma angiosarcoma (disease) EFO:0003968 A malignant tumor arising from the endothelial cells of the blood vessels. Microscopically, it is characterized by frequently open vascular anastomosing and branching channels. The malignant cells that line the vascular channels are spindle or epithelioid and often display hyperchromatic nuclei. Angiosarcomas most frequently occur in the skin and breast. Patients with long-standing lymphedema are at increased risk of developing angiosarcoma. EFO:0003967 Replaced by Mondo term MONDO_0016982, with which this term was previously merged. Use: http://purl.obolibrary.org/obo/MONDO_0016982 ICD10:C49.9 vascular sarcoma