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Haematological response (HR)

A HR refers to the normalisation of blood cell counts. CML causes overproliferation of WBCs, which treatments aims to lower and categories of response indicate the extent to which this occurs. Typically, the HR is classified as complete if the WBC count is < 10 × 109/l, platelet count is < 450 × 109/l, there are no immature cells in the PB with normal differential count, and there is a disappearance of symptoms and signs.