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Sichuan da xue xue bao. Yi xue ban = Journal of Sichuan University. Medical science edition

[Comparison of the long term results between two conditioning regimens MCC and BuCy in chronic myelocytic leukemia after allogeneic stem cell transplantation].


PMID 16608081

Abstract

To observe and evaluate the long term survival of patients with chronic myelocytic leukemia transplanted with MCC and BuCy conditioning regimens. Fourteen cases were treated with MCC regimen (Melphanlan 170 mg/m2 x d x 1, MeCCNU 400 mg/m2 x d x 1, CTX 60 mg/kg x d x 2) and the median follow up time was 6 years; 16 cases were treated with BuCy regimen (Busulfan 4 mg/kg x d x 4, CTX 60 mg/kg x d x 2) and the median follow up time was 4 year. All the patients were engrafted successfully. 4 of 10 patients examined in MCC group showed mixed chimerism at day 100 after transplantation, whereas only 1 of 12 patients examined in BuCy group showed mixed chimerism. All the patients became complete donor source later without any DLI. The 5-year disease-free survival rate was 71.4% for MCC group and 62.5% for BuCy group. The transplant related mortality and relapse rate were 21% and 7% for MCC group, whereas those were 25% and 12% for BuCy group, respectively. The regimen related toxicity was relatively lower in MCC group and the median duration of hospitalization was 39 days (25-55 days) for patients with MCC regimen, and 55 days (39-90 days) for BuCy regimen. MCC regimen has a partial ablative effect on CML and the long term disease-free survival is the same as that of BuCy regimen. In regard to the cost-effect efficacy, MCC regimen has a substantial advantage over BuCy regimen.

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