Chronic myeloid leukaemia (CML) is myeloproliferative neoplasm characterized by the presence of the Philadelphia (Ph) chromosome and BCR-ABL gene, which encodes for a protein with deregulated tyrosine kinase (TK) activity, crucial for malignant transformation in CML. Here, TKT is linked to chronic myelogenous leukemia, BCR-ABL1 positive.