Allo-SCT for AML and MDS with treosulfan compared with BU-based regimens: Reduced toxicity vs reduced intensity

A. Shimoni*, N. Shem-Tov, Y. Volchek, I. Danylesko, R. Yerushalmi, A. Nagler

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Allo-SCT with reduced-intensity conditioning (RIC) results in lower non-relapse mortality (NRM), but higher relapse rate than myeloablative conditioning (MAC) in AML/myelodysplastic syndromes (MDS). Novel regimens with intensive anti-leukemic activity, but with limited toxicity will be of benefit. In all, 85 patients with AML/MDS, not eligible for MAC, were given fludarabine-treosulfan conditioning (FT). Outcomes were compared with those in patients given fludarabine-BU RIC (FB2, n106) or reduced-toxicity (RTC) conditioning (FB4, fludarabine and myeloablative BU dose, n=85). The 5-year NRM was 29%, 20% and 18% after FT, FB2 and FB4, respectively (P=NS). Multivariate analysis (MVA) identified comorbidity score (HCT-CI) >2 and advanced disease as adverse factors with no independent impact of regimen. The 5-year relapse rate was 36%, 47% and 40%, respectively (P=0.17). MVA identified advanced disease as the major adverse factor, while FT had significantly lower relapse rate (hazard ratio 0.6, P=0.03). The 5-year survival (OS) was 37% with advanced disease. HCT-CI >2 and age ≥50 were found as adverse factors. The 5-year OS was 46%, 44% and 50% after FT, FB2 and FB4 in early-intermediate-stage disease (PNS) and 33%, 9% and 28% in advanced disease, respectively (P=0.02). FT is an RTC regimen with intensive anti-leukemia effect in MAC non-eligible patients.

Original languageEnglish
Pages (from-to)1274-1282
Number of pages9
JournalBone Marrow Transplantation
Issue number10
StatePublished - Oct 2012
Externally publishedYes


  • AML
  • BU
  • Myelodysplastic syndrome
  • Reduced-intensity conditioning
  • SCT
  • Treosulfan


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