In myeloid neoplasms other than AML, NPM1 mutation has been detected in MDS (2%) and myelodysplastic/myeloproliferative neoplasms (MDS/MPN) (3%), with MDS/MPN represented by mainly chronic myelomonocytic leukemia (CMML). This evidence concerns the gene NPM1 and myelodysplastic/myeloproliferative neoplasm.