title: Extraosseous osteosarcoma: case report and approach to therapy.
mesh_terms: D000671:Amputation, Surgical; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008875:Middle Aged; D009221:Myositis Ossificans / Q000175:diagnosis; D009364:Neoplasm Recurrence, Local / Q000601:surgery; D012516:Osteosarcoma / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D011379:Prognosis; D013848:Thigh