ABL1 and acute lymphoblastic leukemia: BCR-ABL has been shown to be expressed in more than 95% of CML cases [37], but it is also present in approximately 10% to 20% of adults and 2% to 5% of children with acute lymphoblastic leukemia (ALL) [38,39,40], and in some cases of acute myeloid leukemia (AML) [41,42,43], lymphomas [44,45,46], and myelomas [47,48,49].