title: Osteosarcoma of the testis.
abstract: We studied a unique case of osteosarcoma of the testis. The tumor either originated from indifferent mesenchymal cells, or it represents a one-sided monomorphic development of a teratoma.
mesh_terms: D006801:Humans; D008297:Male; D008875:Middle Aged; D012516:Osteosarcoma / Q000209:etiology / Q000473:pathology*; D013724:Teratoma / Q000473:pathology; D013736:Testicular Neoplasms / Q000209:etiology / Q000473:pathology*; D013737:Testis / Q000473:pathology