The SSXT or SS18 protein is involved in synovial sarcoma in humans. A SYT-SSX fusion gene resulting from the chromosomal translocation t(X;18) (p11;q11) is characteristic of synovial sarcomas. This translocation fuses the SSXT (SYT) gene from chromosome 18 to either of two homologous genes at Xp11, SSX1 or SSX2 [1].

1: The SYT-SSX1 fusion type of synovial sarcoma is associated with increased expression of cyclin A and D1. A link between t(X;18)(p11.2; q11.2) and the cell cycle machinery. Xie Y, Skytting B, Nilsson G, Grimer RJ, Mangham CD, Fisher C, Shipley J, Bjerkehagen B, Myklebost O, Larsson O; Oncogene 2002;21:5791-5796. PMID:12173050