CML: chronic myelocytic leukemia, AML: acute myelocytic leukemia, AML MLL: acute myelocytic leukemia with mixed lineage leukemia, CLL: chronic lymphocytic leukemia, ALL: acute lymphoblastic leukemia, MDS: myelodysplastic syndromes. This evidence concerns the gene KMT2A and B-cell chronic lymphocytic leukemia.