Chronic myeloid leukemia (CML) is a myeloproliferative neoplasm, which results from reciprocal translocation between chromosome 9 and 22 t(9;22) (q34;q11) [Philadelphia chromosome] generating BCR-ABL, a tyrosine kinase encoding oncogene4. Here, ABL1 is linked to chronic myelogenous leukemia, BCR-ABL1 positive.