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[The analysis of failures in the treatment of children with non-B non-Hodgkin's lymphoma. Polish pediatric leukemia/lymphoma study group report].

The aim of the study was to evaluate the results of treatment of 46 children with non B non-Hodgkin's Lymphoma registered in 7 centers of Polish Paediatric Leukaemia/Lymphoma Study Group from 1993 to 1998. The patients were treated according to BFM-90 protocol based on German regimen. The overall probability of event-free survival for the all children after 4 years of follow-up was 71%, for patients in stage III--65%, stage IV--70%. The achieved results were not as positive as in the BFM Study Group, what was related to: the great number of children with advanced stage of disease (54.3%), the late final diagnosis, the great number of recurrences (22.5%) and deaths caused by the toxicity of medication (6.5%) (infections, drug toxicity).