Abstract
We evaluated the possibility of treatment-free remission (TFR) and durability of deep molecular response (DMR) with asciminib treatment by monitoring major BCR::ABL mRNA on the International Scale (BCR::ABL-IS) in 4 patients who needed to reduce or discontinue asciminib due to adverse event concerns, intolerance, or personal circumstances. IS increased in all 4 patients after discontinuation of asciminib, but 3 patients who resumed asciminib achieved DMR again. None of the patients achieved TFR with asciminib, but DMR could be achieved again by restarting asciminib after TFR failure. As this was a retrospective study in a small number of patients, no conclusions can be drawn regarding the possibility of TFR with asciminib. However, this study included patients with short treatment duration and DMR maintenance periods, so strict conditioning may be necessary. Safe dose reduction or TFR with asciminib may need to be considered in more cases.
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