Osteosarcoma.
D000293:Adolescent; D000328:Adult; D000671:Amputation, Surgical; D001706:Biopsy; D001859:Bone Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000628:therapy; D002648:Child; D006801:Humans; D007866:Leg; D008875:Middle Aged; D012516:Osteosarcoma / Q000175:diagnosis* / Q000473:pathology / Q000628:therapy