ABL1 and chronic myelogenous leukemia, BCR-ABL1 positive: CML is the first discovery of a link between cancer and chromosomal abnormality, which also called the Philadelphia (Ph) chromosome, due to the reciprocal translocation that happens between the Abelson murine leukemia virus (ABL) gene on chromosomes 9 and the breakpoint cluster region (BCR) on chromosomes 22 (t9;22) (q34;q11) [2].