Prognostic effect of Ki-67 expression in rituximab, cyclophosphamide, doxorubicin, vincristine and prednisone-treated diffuse large B-cell lymphoma is limited to non-germinal center B-cell-like subtype in late-elderly patients

Young Wha Koh, Hee Sang Hwang, Chan Sik Park, Dok Hyun Yoon, Cheolwon Suh, Jooryung Huh

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

This study evaluated the effect of age and cell of origin on the prognostic significance of Ki-67 labeling index (Ki-67 LI) on overall survival (OS) of diffuse large B-cell lymphoma (DLBCL) in a cohort of 697 patients treated with rituximab plus cyclophosphamide, doxorubicin, vincristine and prednisone (R-CHOP). Multivariate analysis revealed no prognostic significance of high Ki-67 LI (≥ 85%) for OS. However, on subgroup analysis, high Ki-67 LI was significantly associated with poor OS in late-elderly patients (aged ≥ 70 years) (p = 0.021) and non-germinal center B-cell-like (GCB) subtype (p = 0.015). In particular, high Ki-67 LI was associated with a poor prognosis in late-elderly patients with non-GCB subtype. No correlation was observed in young adults (aged < 60 years) or early-elderly (aged 60-70 years) patients or GCB subtype. The present study shows that high Ki-67 LI is a risk factor for poor OS in the late-elderly age group and non-GCB subtype in patients with DLBCL treated with R-CHOP.

Original languageEnglish (US)
Pages (from-to)2630-2636
Number of pages7
JournalLeukemia and Lymphoma
Volume56
Issue number9
DOIs
StatePublished - Sep 2 2015

Bibliographical note

Publisher Copyright:
© 2015 Informa UK, Ltd.

Keywords

  • Diffuse large B-cell lymphoma
  • Ki-67
  • elderly
  • non-GCB

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