extraosseous osteosarcoma https://www.malacards.org/card/extraosseous_osteosarcoma ICD9:170.9 MONDO:0002621 UMLS:C0855052 osteosarcoma, extraskeletal, malignant extraskeletal osteogenic sarcoma GARD:0023192 NCIT:C8810 extraosseous osteosarcoma DOID:3357 MEDGEN:163186 extraskeletal osteosarcoma soft tissue osteosarcoma An osteosarcoma arising from the soft tissue. SCTID:404077005 osteosarcoma soft tissue sarcoma