Immunophenotype and intermediate-high international prognostic index score are prognostic factors for therapy in diffuse large B-cell lymphoma patients

Pier Luigi Zinzani, Alessandro Broccoli, Vittorio Stefoni, Gerardo Musuraca, Elisabetta Abruzzese, Amalia De Renzo, Maria Cantonetti, Francesco Bacci, Michele Baccarani, Stefano A. Pileri

Research output: Contribution to journalArticle

Abstract

Background. The development of gene expression profiling and tissue microarray techniques have provided more information about the heterogeneity of diffuse large B-cell lymphoma (DLBCL), enabling categorization of DLBCL patients into 3 prognostic groups according to cell origin (but independently from the International Prognostic Index [IPI] score): germinal center (GCB), activated B-cell (ABC), and not classified (NC) diffuse large B-cell lymphoma. This study investigated the role of immunohistochemical discrimination between GCB and ABC&NC-DLBCL subtypes in identifying those high-risk patients who may benefit from a more aggressive first-line therapeutic approach. Methods. From February 2003 to August 2006, 45 newly diagnosed DLBCL patients, with IPI≥2, were considered eligible for this study: 13 had a GCB, 8 an ABC, and 24 a NC-DLBCL. GCB patients received 6 courses of rituximab, cyclophophosphamide, doxorubicin, vinicristine, and prednisone (R-CHOP) chemotherapy, with a subsequent, autologous stem cell transplantation in case of partial response. All ABC and NC-DLBCL patients received 6 R-CHOP cycles and autologous stem cell transplantation. Results. Complete response rate for each treatment arm was 84.6% for GCB and 89.7% for ABC&NC-DLBCL (P =.50), with a continuous complete response rate of 81.8% and 84.6%, respectively (P =.59). Projected 4-year overall survival is 100% for GCB and 82% for ABC&NC patients (P =.12). Progression-free survival is 77% and 79% (P =.7), respectively. Conclusions. The autologous stem cell transplantation consolidation in the ABC&NC-DLBCL subtypes induced the same rate of complete response (and similar progression-free survival rate) compared with GCB-DLBCL. In ABC&NC-DLBCL patients the authors observed a complete response rate of 89.7% vs. 84.6% in the GCB-DLBCL subset, without any significant difference in progression-free survival rate.

Original languageEnglish
Pages (from-to)5667-5675
Number of pages9
JournalCancer
Volume116
Issue number24
DOIs
Publication statusPublished - Dec 15 2010

Keywords

  • autologous stem cell transplantation
  • chemotherapy
  • diffuse large B-cell lymphoma
  • immunohistochemistry
  • immunotherapy
  • IPI score

ASJC Scopus subject areas

  • Cancer Research
  • Oncology

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