osteosarcomaListen to pronunciation(OS-tee-oh-sar-KOH-muh)A cancer of the bone that usually affects the large bones of the arm or leg. It occurs most commonly in young people and affects more males than females. Also called osteogenic sarcoma.More InformationOsteosarcoma TreatmentPrimary Bone CancerSearch NCI's Dictionary of Cancer TermsStarts withContainsBrowse:ABCDEFGHIJKLMNOPQRSTUVWXYZ#