Pediatric, acute lymphoblastic leukemia bone marrows; P = 4196 (10000 variation filter, 12,625 Affymetrix HG_U95Av2 probes) [26]43 T-lineage ALL (T)27 E2A-PBX1 (E2A)15 BCR-ABL (BCR)79 TEL-AML1 (TEL)20 MLL (MLL)64 Hyperdiploid>50 (Hyperdip50). This evidence concerns the gene PBX1 and acute lymphoblastic leukemia.