t(X;18)(p11;q11)

**Semantic type:** Cell or Molecular Dysfunction

**Definition:** A chromosomal translocation that involves the X chromosome and chromosome 18. It is often associated with the development of synovial sarcoma.

**Synonyms:** - t(X;18)(p11.2;q11.2) - t(X;18)(p11;q11) (Synovial sarcoma)