Recurrent events also involved the tumor suppressor locus 9p21 with CDKN2A/2B (p16INK4a and p15INK4b) deletions occurring in 17 (57%) of our childhood T-ALL cases (Figure 1 and Supplementary Table S3), of which 14 were biallelic. The gene discussed is CDKN2A; the disease is acute lymphoblastic leukemia.