• Int. J. Radiat. Oncol. Biol. Phys. · Aug 2008

    Multicenter Study

    Results of hematopoietic stem cell transplantation after treatment with different high-dose total-body irradiation regimens in five Dutch centers.

    • M Loes van Kempen-Harteveld, Ronald Brand, Henk B Kal, Leo F Verdonck, Pieter Hofman, Anton V Schattenberg, Richard W van der Maazen, Jan J Cornelissen, Wil M H Eijkenboom, Johannes P van der Lelie, Foppe Oldenburger, Renée M Barge, Anja van Biezen, Jaak M J J Vossen, Evert M Noordijk, and Henk Struikmans.
    • Department of Radiotherapy, University Medical Center, Utrecht, The Netherlands. mlvankempen@tiscali.nl
    • Int. J. Radiat. Oncol. Biol. Phys. 2008 Aug 1; 71 (5): 1444-54.

    PurposeTo evaluate results of high-dose total-body irradiation (TBI) regimens for hematopoietic stem cell transplantation.Methods And MaterialsA total of 1,032 patients underwent TBI in one or two fractions before autologous or allogeneic hematologic stem cell transplantation for acute leukemia and non-Hodgkin's lymphoma. The TBI regimens were normalized by using the biological effective dose (BED) concept. The BED values were divided into three dose groups. Study end points were relapse incidence (RI), non-relapse mortality (NRM), relapse-free survival (RFS), and overall survival (OS). Multivariate analysis was performed, stratified by disease.ResultsIn the highest TBI dose group, RI was significantly lower and NRM was higher vs. the lower dose groups. However, a significant influence on RFS and OS was not found. Relapses in the eye region were found only after shielding to very low doses. Age was of significant influence on OS, RFS, and NRM in favor of younger patients. The NRM of patients older than 40 years significantly increased, and OS decreased. There was no influence of age on RI. Men had better OS and RFS and lower NRM. Type of transplantation significantly influenced RI and NRM for patients with acute leukemia and non-Hodgkin's lymphoma. There was no influence on RFS and OS.ConclusionsBoth RI and NRM were significantly influenced by the size of the BED of single-dose or two-fraction TBI regimens; OS and RFS were not. Age was of highly significant influence on NRM, but there was no influence of age on RI. Hyperfractionated TBI with a high BED might be useful, assuming NRM can be reduced.

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