Reason: 17 y/o M with R leg osteosarcoma; pre-surgical evaluation History: R leg osteosarcoma There is large soft tissue mass with osteolysis of the proximal right fibula measuring approximately 11.8 x 8.5 x 12.1 cm. This mass abuts the right tibia but does not appear to invade the cortex. There is heterogenous enhancement of this mass with regions of nonenhancement compatible with necrosis. There is extensive involvement of the surrounding muscles.
Large heterogeneously enhancing mass with destruction of proximal right fibula, compatible with history of osteosarcoma. 