sarcoma osteosarcoma https://github.com/monarch-initiative/mondo/issues/5537 osteogenic sarcoma bone tissue neoplasm ICDO:9180/3 MONDO:0009807 osteosarcoma, malignant NCIT:C9145 EFO:0000637 osteoid sarcoma osteosarcoma sarcoma of osteoid A usually aggressive malignant bone-forming mesenchymal neoplasm, predominantly affecting adolescents and young adults. It usually involves bones and less frequently extraosseous sites. It often involves the long bones (particularly distal femur, proximal tibia, and proximal humerus). Pain with or without a palpable mass is the most frequent clinical symptom. It may spread to other anatomic sites, particularly the lungs. MEDGEN:10501 HP:0002669 osteosarcoma (disease) DOID:3347 ONCOTREE:OS NANDO:2200048 osteosarcoma (disease) MESH:D012516 UMLS:C0029463