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Early mixed chimerism‐based preemptive immunotherapy in children undergoing allogeneic hematopoietic stem cell transplantation for acute leukemia
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https://doi.org/10.1002/pbc.26464Abstract
This retrospective analysis comprises 10-year experience with early posttransplant mixed chimerism-based preemptive intervention. Out of 104 patients, 51 received preemptive immunotherapy. Their outcomes were similar to patients achieving full donor chimerism spontaneously. Among patients receiving intervention, 5-year event-free survival was identical in patients with and without pretransplant residual disease, respectively (68% [95% confidence interval (CI) 38-98%] vs. 69% [95% CI 54-85%] log-rank = 0.4). In patients who received preemptive immunotherapy, chimerism status and residual disease prior to transplant were no longer predictors of poor outcome; however, 41% of the patients with residual disease prior to transplant relapsed early and did not benefit from this strategy.
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