Abstract
Therapy-related myeloid neoplasms (t-MNs) are severe long-term consequences of cytotoxic treatments for a primary, often, malignant disorder. So far, the majority of patients eligible for transplantation have undergone myeloablative allo haematopoietic SCT (HSCT) as a potentially curative treatment, but it has been associated with high transplantation-related mortality (TRM) rates. In this retrospective study, we analysed the outcome of patients with t-MNs undergoing HSCT with reduced-intensity conditioning (RIC). Of 55 patients, seen at a single centre over a 10-year period, 17 underwent RIC HSCT with related or unrelated donors. The estimated overall survival was 53% at 1 year and 47% at 3 years, and disease-free survival was 47% at 1 year. At 1 year, the cumulative incidence of relapse and TRM were 24% and 30%, respectively. Of five patients with active primary neoplasms who underwent transplantation, two are alive beyond 1 year and show CR of both t-MNs and the primary malignancy. These data indicate that RIC HSCT is an encouraging approach for patients with t-MNs. The issue of primary malignancies not being in remission at the time of transplantation should be explored in further studies.
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