title: [A case of extraskeletal osteosarcoma of the mediastinum].
mesh_terms: D002114:Calcinosis / Q000473:pathology; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D008479:Mediastinal Neoplasms / Q000175:diagnosis* / Q000473:pathology; D008875:Middle Aged; D012516:Osteosarcoma / Q000175:diagnosis* / Q000473:pathology; D011379:Prognosis