t(3;12)(q23;p12.3)

**Semantic type:** Cell or Molecular Dysfunction

**Definition:** A cytogenetic abnormality that refers to the translocation of the long arm (q23) of chromosome 3 and the short arm (p12.3) of chromosome 12. It is associated with ETV6/MECOM (EVI1) fusions, myeloproliferative disorders, myelodysplastic syndromes and acute myelogenous leukemia.