The introduction of BCR-ABL1 tyrosine kinase inhibitors (TKIs) for treatment of chronic myeloid leukemia (CML) has made it possible for this cancer to be controlled in many patients for long periods with chronic medication and regular monitoring of disease status. Hematologic and cytogenetic testing, molecular monitoring, and BCR-ABL1 mutational analysis have become integral to the routine management of CML. The information that each type of test provides is essential to confirm a diagnosis, determine the disease stage, assess response to treatment, and monitor for signals of disease progression – all of which can be used to identify patients who might require further evaluation, closer follow-up, and additional intervention, and to guide clinical decisions.
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