title: [A rare cause of soft tissue ossification: extraosseous osteosarcoma. Presentation of a case].
mesh_terms: D000328:Adult; D000792:Angiography; D005263:Femoral Artery / Q000000981:diagnostic imaging; D006801:Humans; D007866:Leg; D008297:Male; D009999:Ossification, Heterotopic / Q000000981:diagnostic imaging / Q000209:etiology*; D012516:Osteosarcoma / Q000150:complications* / Q000175:diagnosis / Q000000981:diagnostic imaging; D011150:Popliteal Artery / Q000000981:diagnostic imaging; D012983:Soft Tissue Neoplasms / Q000150:complications* / Q000175:diagnosis / Q000000981:diagnostic imaging
vernacular_title: Una rara causa di ossificazione nelle parti molli: l'osteosarcoma extra-osseo. Presentazione di un caso.