ABL1 and chronic myelogenous leukemia, BCR-ABL1 positive: In recent years, the discovery of imatinib mesylate (IM), as the first designed BCR-ABL1 tyrosine kinase inhibitor (TKI) and additional second- (dasatinib, nilotinib (NIL), and bosutinib) and third-generation (ponatinib) TKIs have dramatically enhanced the chance of survival in CML patients [7].