t(2;18)(p12;q21)

**Semantic type:** Cell or Molecular Dysfunction

**Definition:** A chromosomal translocation involving breakpoints within the p12 band on the short arm of chromosome 2 and the q21 band on the long arm of chromosome 18. This rearrangement may associated with PIGN-CTNNA2 fusion gene expression and atypical jejunal follicular lymphoma with severe stricture.