Comparing presenting features with IKZF1 isoform type (Table 2), the Ik-6+ patients were significantly older (50 vs. 34, p = 0.021) and showed less CD10 expression (in B-ALL cases) than the cases without Ik-6 (32% vs. 61.4%, p = 0.041). This evidence concerns the gene IKZF1 and acute lymphoblastic leukemia.