Pediatric diffuse large B-cell lymphoma demonstrates a high proliferation index, frequent c-Myc protein expression, and a high incidence of germinal center subtype: Report of the French-American-British (FAB) international study group
Background Diffuse large B‐cell lymphoma (DLBCL) makes up 10–20% of pediatric non‐Hodgkin lymphoma, and these patients have a significantly better prognosis than adults with DLBCL. The difference in prognosis may be related to clinical, phenotypic, and/or biological differences between adult and ped...
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Published in | Pediatric Blood & Cancer Vol. 51; no. 3; pp. 369 - 374 |
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Main Authors | , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Hoboken
Wiley Subscription Services, Inc., A Wiley Company
01.09.2008
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Subjects | |
Online Access | Get full text |
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Summary: | Background
Diffuse large B‐cell lymphoma (DLBCL) makes up 10–20% of pediatric non‐Hodgkin lymphoma, and these patients have a significantly better prognosis than adults with DLBCL. The difference in prognosis may be related to clinical, phenotypic, and/or biological differences between adult and pediatric DLBCL. In adult DLBCL, the germinal center (GC) phenotype is associated with a better prognosis than the activated B‐cell (ABC) phenotype. However, a high proliferative index and expression of Bcl2 and c‐Myc protein have all been associated with worse outcomes. While multiple studies have addressed the phenotype and expression patterns of adult DLBCL, relatively little is known about these biological variables in pediatric DLBCL. The goal of this study was to investigate the proliferative index, the relative frequencies of the GC and non‐GC subtypes, and the expression of Bcl2 and c‐Myc protein in a cohort of children with DLBCL treated in a uniform manner.
Procedure
We performed immunohistochemistry (IHC) for MIB1, CD10, Bcl6, MUM1, Bcl2, and c‐Myc on DLBCL tissue from children treated uniformly in the FAB LMB96 trial (SFOP LMB96/CCG5961/UKCCSG/NHL 9600).
Results
Compared to published adult DLBCL studies, pediatric DLBCL demonstrated moderate to high proliferation rates (83%), increased c‐Myc protein expression (84%), decreased Bcl2 protein expression (28%), and an increased frequency of the GC phenotype (75%).
Conclusions
These findings suggest that there are significant biologic differences between pediatric and adult forms of DLBCL, which may contribute to the superior prognosis seen in the pediatric population relative to adult disease. Pediatr Blood Cancer 2008;51:369–374. © 2008 Wiley‐Liss, Inc. |
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Bibliography: | Institut-Gustave-Roussy (SFOP) Pediatric Cancer Research Foundation (PCRF) Division of Cancer Treatment Association pour la Recherche Contre le Cancer Department of Health and Human Services (COG) National Institutes of Health istex:52D5F933010329A8B6804E0551A2DB007D90B7D2 ark:/67375/WNG-2VN8Q5V4-B La Ligue Nationale Contre le Cancer National Cancer Institute Cancer Research Campaign (UKCSSG) Associated University and Regional Pathologists (ARUP) Institute for Research and Development Presented in part at the 9th International Conference on Malignant Lymphoma, 8-11 June, 2005, Lugano, Switzerland, and at the Second International Symposium on Childhood and Adolescent Non-Hodgkin's Lymphoma, 18-20 May, 2006, New York, NY. ArticleID:PBC21619 Presented in part at the 9th International Conference on Malignant Lymphoma, 8–11 June, 2005, Lugano, Switzerland, and at the Second International Symposium on Childhood and Adolescent Non‐Hodgkin's Lymphoma, 18–20 May, 2006, New York, NY. ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1545-5009 1545-5017 1096-911X |
DOI: | 10.1002/pbc.21619 |