Extraosseous osteogenic sarcoma.
D000328:Adult; D000368:Aged; D002081:Buttocks; D004550:Elbow; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009362:Neoplasm Metastasis; D009364:Neoplasm Recurrence, Local; D009379:Neoplasms, Muscle Tissue / Q000473:pathology / Q000601:surgery; D012516:Osteosarcoma / Q000473:pathology / Q000601:surgery; D011379:Prognosis; D013848:Thigh; D013899:Thoracic Neoplasms / Q000473:pathology / Q000601:surgery