Osteosarcoma.
D000293:Adolescent; D000328:Adult; D000671:Amputation, Surgical; D001859:Bone Neoplasms / Q000532:radiotherapy / Q000601:surgery; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007717:Knee / Q000601:surgery; D012516:Osteosarcoma / Q000532:radiotherapy / Q000601:surgery