BCR and chronic myelogenous leukemia, BCR-ABL1 positive: The proportions of patients with atypical BCR-ABL1 signal patterns were similar, accounting for 17.6% (n = 3), 15.4% (n = 8) and 24.3% (n = 59) in the CML-BP, ALL and CML-CP patients, respectively (p = 0.369) (Fig. 2c).