Indian Journal of Pathology and Microbiology
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CASE REPORT
Year : 2009  |  Volume : 52  |  Issue : 4  |  Page : 520-523

Primary endobronchial synovial sarcoma confirmed by SYT-SSX1 fusion gene transcript by reverse transcriptase polymerase chain reaction


1 Department of Pathology, Tata Memorial Hospital, India
2 Department of Surgical Oncology, Tata Memorial Hospital, India
3 Department of Medical Oncology, Tata Memorial Hospital, India

Correspondence Address:
Santosh Menon
Department of Pathology, Tata Mmeorial Hospital, Dr Ernest Borges Marg, Parel, Mumbai-400012
India
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DOI: 10.4103/0377-4929.56147

PMID: 19805961

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Primary sarcomas of lung are rare compared to metastatic sarcomas. Herein, we report a rare case of primary pulmonary synovial sarcoma with polypoid endobronchial growth in a 35-year-old lady who presented with cough and dyspnea. A malignant pulmonary tumor was suspected and left pneumonectomy was performed. Grossly, a non-encapsulated polypoidal endobronchial tumor measuring 6 cm in greatest diameter, with a solid, tan-white cut surface was identified. Microscopically, tumor was characterized by a proliferation of oval to spindle-shaped cells arranged in sheets and fascicles. Focal hemangiopericytomatous pattern was noted. Immunohistochemically, tumor cells were positive for vimentin, BCL-2, MIC-2 and calponin and focally positive for pancytokeratin and epithelial membrane antigen. A subsequent molecular analysis performed using reverse transcriptase-polymerase chain reaction with RNA extracted from paraffin-embedded tissue, revealed SYT/SSX1 fusion gene which confirmed the diagnosis of synovial sarcoma. The utility of immunohistochemistry and molecular techniques in diagnosis of such a rare case is stressed and the relevant literature is discussed.


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