In the other poor risk (PR) category of B-ALL with KMT2A-AFF1 (5%; n = 6 cases) genetic abnormalities (Figure 3), gene deletions were detected in IKZF1, CDKN2A/B, TP53, IKZF3, and VPREB1 genes. This evidence concerns the gene CDKN2A and acute lymphoblastic leukemia.