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Extraskeletal Osteosarcoma

Summary

A rare variant of osteosarcoma that accounts for less than 4% of all osteosarcomas.

The most common site of metastasis is the lungs.
Xray and MRI may show small foci of mineralization within the mass. Bone scan shows uptake in the tumor.
Neoadjuvant chemotherapy, wide resection, adjuvant chemotharapy