Source:http://linkedlifedata.com/resource/umls/id/C1377843
NCI: An intermediate grade chondroblastic osteosarcoma arising on the surface of bone.,NCI: An intermediate grade malignant bone-forming mesenchymal neoplasm with chondroblastic differentiation. The tumor arises from the surface of the bone and affects the diaphysis or diaphyseal- metaphyseal portion of the long bones. A painless mass or swelling is the most common clinical sign. It is associated with a better prognosis than conventional osteosarcoma.