ABL1 and acute lymphoblastic leukemia: In the present study, we analyzed 373 patients with BCP-ALL without hyperdiploid karyotype and recurrent fusions, such as ETV6-RUNX1, E2A-PBX1, MLL-related fusions and BCR-ABL, because we did not have enough data for gene expression profiling, which is mandatory for the diagnosis of Ph-like ALL.