Moreover, translocations t(10;22)(q11;q11) and t(6;10)(q27;q11) generating BCR-RET and FGFR1OP-RET fusions have been identified in single cases of chronic myelomonocytic leukemia (CMML) and primary myelofibrosis (PMF) with secondary acute myeloid leukemia (AML) [26,122]. This evidence concerns the gene RET and primary myelofibrosis.