Even if recent data has implicated that the type of fusion gene (SYT/SSX1 or SYT/SSX2) can be of prognostic importance, the cellular and molecular mechanisms underlying the clinical behavior of synovial sarcoma are still poorly understood.     ///     The t(X;18)(p11.2;q11.2) (SYT/SSX1 or SSX2) is represented in more than 95% of synovial sarcoma. 