BCR and acute lymphoblastic leukemia: In the poor risk (PR) category, the dominant CNAs detected in B-ALL with BCR-ABL genetic abnormalities (14%; n = 17 cases) (Figure 3) were deletions in IKZF1 (~82%; n = 14 cases) and CDKN2A/B locus (~53%; n = 9 cases) (Figure 4).