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Medical Definition of Osteosarcoma

Osteosarcoma: A cancer of the bone that is most common in adolescents and young adults. Treatment involves surgery, usually followed by chemotherapy or radiation. The site of the tumor is the most important prognostic factor, because it determines whether the tumor can be surgically removed. Also known as osteogenic sarcoma.

Source: MedTerms™ Medical Dictionary
Last Editorial Review: 5/13/2016

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