BCR and acute lymphoblastic leukemia: However, the PSL poor responders and induction failure rates in our study did not differ significantly from those reported in the Ph+ ALL cohort (44.8% vs 21.4%, P=0.07 and 13.8% vs 14%, P=0.86, respectively).24 These findings suggested clinical similarities between Ph+ ALL and BCP-ALL with kinase fusions other than BCR-ABL.