t(X;1)(p11.2;q21)

**Semantic type:** Cell or Molecular Dysfunction

**Definition:** A chromosomal translocation involving breakpoints within the p11.2 band on the short arm of the X chromosome and the q21 band on the long arm of chromosome 1. This rearrangement is associated with PRCC-TFE3 fusion gene expression and TFE3-rearranged renal cell carcinoma.