Primary bone diffuse large B-cell lymphoma: Clinicopathologic study of 21 cases and review of literature

Sharathkumar Bhagavathi, Mark A. Micale, Kimberly Les, Jon D. Wilson, Michele L. Wiggins, Kai Fu

Research output: Contribution to journalArticle

30 Scopus citations

Abstract

Primary bone diffuse large B-cell lymphomas (PB-DLBCL) are uncommon extranodal lymphomas. Herein, we report the clinical, pathologic, immunohistochemical, and molecular features of 21 cases of PB-DLBCL. The mean age of the patients was 54 years (range: 13 to 85y). The male and female ratio was 1.6:1. The tumors consisted of diffuse sheets of large atypical cells or a polymorphous mixture of small-to-large cells with large multilobated nuclei, fine chromatin, and inconspicuous to prominent nucleoli. Twelve (57%) cases were non-germinal center B (GCB) and 9 (43%) were GCB subtype based on immunohistochemical classification. B-cell lymphomas (BCL)-2 was positive in 17/21 (81%), TP53 in 11/21 (52%) positive and the mean MIB-1 index was 57%. Polymerase chain reaction showed 10 cases with immunoglobulin heavy-chain (IGH) and 4 cases with IGH/BCL-2 gene rearrangement. The fluorescence in-situ hybridization analyses showed 14% of cases with BCL-6, 19% of cases with BCL-2, and 9% of cases with C-MYC gene rearrangement. Age <60 years and complete response to initial treatment were significant predictors of survival outcome (P≤0.05). Even though no association was observed between the subtype of PB-DLBCL (GCB vs. non-GCB), BCL2, TP53, MIB1 index and overall survival (P>0.05), due to small sample size, and variability in treatment received, this analysis may be interpreted with caution.

Original languageEnglish (US)
Pages (from-to)1463-1469
Number of pages7
JournalAmerican Journal of Surgical Pathology
Volume33
Issue number10
DOIs
StatePublished - Oct 2009

Keywords

  • BCL6
  • C-MYC
  • IGH
  • IGH-BCL2
  • Immunohistochemistry
  • Overall survival

ASJC Scopus subject areas

  • Anatomy
  • Surgery
  • Pathology and Forensic Medicine

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