Synovial sarcomas, which represent approximately 10% of all soft tissue sarcomas, are aggressive spindle cell sarcomas containing in some cases areas of epithelial differentiation. They consistently show a specific t(X;18)(p11.2;q11.2), which usually represents either of 2 gene fusions, SYT (600192)-SSX1 (312820) or SYT-SSX2 (300192), encoding putative transcriptional proteins differing at 13 amino acid positions (summary by Ladanyi et al., 2002).
Synovial sarcoma, according to the experience of Enzinger and Weiss (1983), is the fourth most common type of soft tissue sarcoma. It usually develops in adolescents and young adults, is more common in males than in females, and has no racial predilection. [from
OMIM]