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- W4322758935 abstract "Diffuse large B-cell lymphoma (DLBCL) is classified into two molecular subtypes according to its cell of origin: germinal center B-cell (GCB) subtype and activated B-cell/non-GCB subtype. This latter subtype shows a poorer prognosis in adults. However, in pediatric DLBCL, the prognostic impact of the subtype is yet to be clarified.This study sought to compare the prognosis between GCB and non-GCB DLBCL in a large number of cases in children and adolescents. In addition, this study intended to describe the clinical, immunohistochemical, and cytogenetic characteristics of these two molecular subtypes of DLBCL, and consider differences in the biology, frequency, and prognosis of GCB and non-GCB subtypes in pediatric versus adult DLBCL or in Japanese versus Western pediatric DLBCL patients.We selected mature B-cell lymphoma/leukemia patients for whom specimens had been submitted to the central pathology review in Japan between June 2005 and November 2019. We referred the past studies on Asian adult patients and Western pediatric patients to compare with our results.Data were obtained from 199 DLBCL patients. The median age of all patients was 10 years, with 125 patients (62.8%) in the GCB group and 49 (24.6%) in the non-GCB group other than 25 cases whose immunohistochemical data were insufficient. Overall, the percentage of translocation of MYC (1.4%) and BCL6 (6.3%) was lower than in adult and Western pediatric DLBCL cases. The non-GCB group showed a significantly higher proportion of females (44.9%), a higher incidence of stage III disease (38.8%), and B-cell lymphoma 2 (BCL2)-positivity in immunohistochemistry (79.6%) compared to the GCB group; however, no BCL2 rearrangement was observed in both GCB and non-GCB groups. The prognosis did not differ significantly between the GCB and non-GCB groups.This study including a large number of non-GCB patients showed the same prognosis between GCB and non-GCB groups and suggested a difference in the biology of pediatric and adolescent DLBCL compared to adult DLBCL as well as between Asian and Western DLBCL." @default.
- W4322758935 created "2023-03-03" @default.
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- W4322758935 date "2023-03-01" @default.
- W4322758935 modified "2023-10-02" @default.
- W4322758935 title "Non‐germinal center B‐cell subtype of pediatric diffuse large B‐cell lymphoma in Japan: A retrospective cohort study" @default.
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- W4322758935 doi "https://doi.org/10.1002/pbc.30279" @default.
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