J Korean Radiol Soc.
1989 Oct;25(5):786-792. 10.3348/jkrs.1989.25.5.786.
Osteosarcoma arising on the surface of long bones: a review of radiologic and histologic spectrum in 9 cases
- KMID: 2359062
- DOI: http://doi.org/10.3348/jkrs.1989.25.5.786
Abstract
- Nine patients with osteosarcoma arising on the surfaces of long bones were evaluated restrospectively in the points of the clinical, radiographic and histologic view,. In reviewing the literature, we classified the tumors into three subgroups: parosteal, periosteal, and high grade surface osteosarcoma. Six patients had parosteal osteosarcoma, two periosteal osteosarcomas, and one high grade surface osteosarcoma. Radiographic and histologic findings can afford to the differentiation of these tumor from each other and from classical osteosarcoma. Allplain radiographs of four patients with parosteal osteosarcoma revealed heavily dense, lobulated masses protruded from the adjacent long bones. CT could permitted the establishment of the extent of lesions whether either the marrows or the neurovascular bundles were involved or not, in three parosteal osteosarcomas and one periosteal osteosarcoma. In two periosteal osteosarcomas & one high-grade surface osteosarcoma either spotty ossification orspiculated appearance of the tumor matrices were detected. Isotope bone scan gave the accurate informations not about the tumor extent but the metastases to bones. Histologically, six parosteal osteosarcomas were generallylow-grade, but two of them shows high-grade in certain areas of the tumors. Two periosteal osteosarcomas contained particularly low grade chondroblastic component. One high grade surface osteosarcoma was indistinguishable from classical osteosarcoma. Authors believe that both radiographic and histologic findings could afford to the differentiation of these tumors from each other and from classical osteosarcoma and that one should pay attention to the surface osteosarcomas because of the variable tumor behaviors according to each subtype.
