Primary pulmonary synovial sarcoma is characterized by a reciprocal chromosomal translocation t(x;18)(p11;q11) which fuses the SYT gene on chromosome 18 to one of two homologous genes on chromosome x, SSX1 or SSX2. The fusion transcripts are detected by reverse transcriptase-polymerase chain reaction (RT-PCR) or fluorescence in situ hybridization (FISH) and are thought to function as aberrant transcription regulators [2, 6]. Here, SSX1 is linked to synovial sarcoma.