title: Primary pulmonary synovial sarcoma: a case report.
abstract: We report a rare case of primary synovial sarcoma of the lung. A57-year-old man had a well-defined tumor in the right middle lobe seen on chest computed tomography, and underwent lobectomy. Grossly, the nonencapsulated tumor measured 4.5 cm in greatest diameter, with a solid and tan-white cut surface. Histologically, the tumor was mainly composed of a dense proliferation of spindle cells. Immunohistochemical studies were focally positive for epithelial membrane antigen, and diffusely positive for CD99 and Bcl-2. Cytokeratin, S-100 protein, desmin, smooth muscle act in, and CD34 were absent. SYT-SSX1 gene fusion transcript was detected by reverse transcription-polymerase chain reaction, which is diagnostic of primary synovial sarcoma of the lung. We also review the literature with regard to the clinicopathologic, immunohistochemical, and molecular studies of primary pulmonary synovial sarcoma.
authors.affiliation: Department of Pathology, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan.
authors.forename: Hsin-Hung
authors.initials: HH
authors.lastname: Chen
authors.forename: Wan-Ting
authors.initials: WT
authors.lastname: Huang
authors.forename: Wan-Yi
authors.initials: WY
authors.lastname: Kang
authors.forename: Hsuan-Ying
authors.initials: HY
authors.lastname: Huang
authors.forename: Chee-Yin
authors.initials: CY
authors.lastname: Chai
mesh_terms: D006801:Humans; D008175:Lung Neoplasms / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D015514:Oncogene Proteins, Fusion / Q000235:genetics; D012333:RNA, Messenger / Q000032:analysis; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013584:Sarcoma, Synovial / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery
chemical_list: D015514:Oncogene Proteins, Fusion; D012333:RNA, Messenger; C116512:SYT-SSX fusion protein