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  • Title: Fractionated total body irradiation and high-dose VP-16 with purged autologous bone marrow rescue for children with high risk relapsed acute lymphoblastic leukemia.
    Author: Schmid H, Henze G, Schwerdtfeger R, Baumgarten E, Besserer A, Scheffler A, Serke S, Zingsem J, Siegert W.
    Journal: Bone Marrow Transplant; 1993 Dec; 12(6):597-602. PubMed ID: 8136744.
    Abstract:
    Twenty-two children with ALL in high risk second (n = 13), third or subsequent complete remission (n = 9) were treated with high-dose VP-16 60 mg/kg and fractionated total body irradiation (fTBI) 12 Gy, 2 x 2 Gy daily followed by autologous BM rescue. Prior to transplantation all patients had been treated according to intensive German BFM front-line or BFM relapse protocols. In all cases the marrow was purged using monoclonal antibodies attached to magnetic microspheres. All patients engrafted. There was no severe toxicity related to the pre-transplant high-dose chemoradiotherapy. Two patients died in the early course of transplantation from infections (Legionella and Aspergillus). Sixteen patients relapsed within 259 days (median 109 days); 13 died from leukemia. Four patients are alive in CR at a median of 1328 days with a Karnofsky score of 100%. The Kaplan-Meier estimation shows a probability of event-free survival (EFS) of 18% and a probability of relapse of 80%. Considering the otherwise poor prognosis of these children the results are acceptable although the high relapse rate is still disappointing. We conclude that high-dose VP-16 and fTBI combined with ABMT is a curative treatment for some children and should therefore be considered for those who lack an HLA-identical sibling donor. In future better therapy concepts are needed either in pre-transplant conditioning regimens or in post-transplant treatment schedules.
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