Matched unrelated donor stem cell transplantation (MUD-SCT) provides the only curative option for patients with follicular lymphoma (FL) who fail conventional therapies and do not have a sibling donor. The purpose of this study was to analyse the outcome of patients with FL treated with MUD-SCT included in the European Group for Blood and Marrow Transplantation registry. 131 patients treated with reduced-intensity conditioning (RIC, n = 87) or conventional myeloablative (CONV, n = 44) MUD-SCT between 2000 and 2005 were included. Median time from diagnosis to MUD-SCT was 47 months and the median number of previous therapeutic regimens was 4 (previous autograft: 47%). RIC recipients were significantly older, with a longer interval from diagnosis to MUD-SCT and had failed a previous autograft more frequently than CONV recipients. Non-relapse mortality (NRM) was 24% and 30% at 100-d and 1-year, respectively. After a median follow-up of 36 months, 17% of the patients developed disease progression, the 3-year progression-free survival (PFS) being 47%. Three-year overall survival (OS) for the whole series was 51%. On multivariate analysis, RIC regimens were associated with at lower NRM and a significantly longer PFS and OS. This retrospective study demonstrated that MUD-SCT results, even in heavily pre-treated populations, in a meaningful PFS and OS.

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Keywords Conditioning regimen, Follicular lymphoma, Matched unrelated donor transplant
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Avivi, I, Montoto, S, Canals, C, Maertens, J, Al-Ali, H, Mufti, G.J, … Sureda, A. (2009). Matched unrelated donor stem cell transplant in 131 patients with follicular lymphoma: An analysis from the Lymphoma Working Party of the European Group for Blood and Marrow Transplantation. British Journal of Haematology, 147(5), 719–728. doi:10.1111/j.1365-2141.2009.07905.x