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Stem Cell Transplantation in Children with Myelodysplastic Syndromein the Czech Republic 1997–2002


Authors: J. Starý 1;  P. Sedláček 1;  P. Kobylka 2;  M. Loudová 2;  H. Řihová 2;  E. Ivašková 3;  H. Pittrová 4;  ............
Authors‘ workplace: II. dětská klinika UK 2. LF a FN Motol, Praha, 2Ústav hematologie a krevní transfuse, Praha, 3Český registr dárců kostní dřeně, Praha, Český národní registr dárců dřeně o. p. s., Plzeň 1
Published in: Transfuze Hematol. dnes,, 2003, No. 1, p. 22-29.
Category:

Overview

Myelodysplastic syndrome (MDS) is a rare, clonal abnormality of the pluripotent haematopoietic stemcell. Stem cell transplantation (SCT) is the only curative treatment modality which has been for a longtime connected with high transplant related mortality and relapse. The Czech Republic participates inthe international study EWOG-MDS. In this study children are indicated to SCT early using a veryintensive myeloablative conditioning regimen comprising 3 alkylating agents – busulfan, cyclophosphamideand melphalan. Between 1997–2002, 14 children with primary MDS (JMML: 5, RC: 4, RAEB: 2,RAEBt: 2, MDSr-AML: 1) were transplanted from HLA identical siblings (n = 7) or unrelated donors (n= 7). Median age at the SCT was 5.8 years; median time from diagnosis to SCT was 5 months.A conditioning regimen of 3 alkylating agents was used in 12 children; two patients with refractorycytopenia were transplanted from unrelated donors using a non-myeloablative conditioning regimenof fludarabin and thiotepa. As GVHD prophylaxis cyclosporin was used alone (n = 5) or in combinationwith methotrexate (n = 7) or steroids (n = 1). All patients engrafted. Acute GVHD grades II–IV developedin 57 % patients and extensive chronic GVHD in 20 % children. Four children (28.5 %) died due totransplant related causes and one patient (7 %) after syngeneic SCT developed a relapse treated bya second SCT from an unrelated donor. After amedian follow-up of 1.9 years, 10 children (71 %) are alivein complete remission. Allogeneic SCT performed according to the EWOG-MDS recommendationsimproved significantly the prognosis of children with MDS in the Czech Republic.

Key words:
myelodysplastic syndrome, children, stem cell transplantation, relapse, graft-versus-hostdisease

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