CDKN2B and acute lymphoblastic leukemia: T-ALL with CDKN2B deletion was diagnosed at a younger age than in patients harboring hypermethylation (median, 15.7 vs. 29.5 years, P = 0.001) and was associated with lower platelet counts (median, 52.0 × 1000/μL vs. 79.0 × 1000/μL, P = 0.018) and higher BM blast values (median, 95.0% vs. 91.0%, P = 0.043).