Allogeneic stem cell transplantation after reduced-intensity conditioning in patients with myelofibrosis: A prospective, multicenter study of the Chronic LeukemiaWorking Party of the European Group for Blood and Marrow Transplantation

Nicolaus Kröger*, Ernst Holler, Guido Kobbe, Martin Bornhäuser, Rainer Schwerdtfeger, Herrad Baurmann, Arnon Nagler, Wolfgang Bethge, Matthias Stelljes, Lutz Uharek, Hannes Wandt, Andreas Burchert, Paolo Corradini, Jörg Schubert, Martin Kaufmann, Peter Dreger, Gerald G. Wulf, Hermann Einsele, Tatjana Zabelina, Hans Michael KvasnickaJürgen Thiele, Ronald Brand, Axel R. Zander, Dietger Niederwieser, Theo M. De Witte

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

From 2002 to 2007, 103 patients with primary myelofibrosis or postessential thrombocythemia and polycythemia vera myelofibrosis and a median age of 55 years (range, 32-68 years) were included in a prospective multicenter phase 2 trial to determine efficacy of a busulfan (10 mg/kg)/fludarabine (180 mg/m 2)-based reduced-intensity conditioning regimen followed by allogeneic stem cell transplantation from related (n = 33) or unrelated donors (n = 70). All but 2 patients (2%) showed leukocyte and platelet engraftment after a median of 18 and 22 days, respectively. Acute graft-versus-host disease grade 2 to 4 occurred in 27% and chronic graft-versus-host disease in 43% of the patients. Cumulative incidence of nonrelapse mortality at 1 year was 16% (95% confidence interval, 9%-23%) and significantly lower for patients with a completely matched donor (12% vs 38%; P = .003). The cumulative incidence of relapse at 3 years was 22% (95% confidence interval, 13%-31%) and was influenced by Lille risk profile (low, 14%; intermediate, 22%; and high, 34%; P = .02). The estimated 5-year event-free and overall survival was 51% and 67%, respectively. In a multivariate analysis, age older than 55 years (hazard ratio = 2.70; P = .02) and human leukocyte antigen-mismatched donor (hazard ratio = 3.04; P = .006) remained significant factors for survival. The study was registered atwww.clinicaltrials.gov as #NCT 00599547.

Original languageEnglish
Pages (from-to)5264-5270
Number of pages7
JournalBlood
Volume114
Issue number26
DOIs
StatePublished - 17 Dec 2009
Externally publishedYes

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