Mutations in epigenetic factors are frequent in T-ALL: PHF6 (Xq26), SUZ12 (17q11), EZH2 (7q36), TET2 (4q24), H3F3A (1q42), KDM6A (Xp11), EED (11q14), SETD2 (3p21), and DNMT3A (2p23) mutations are the most common (32, 35). This evidence concerns the gene KDM6A and acute lymphoblastic leukemia.