Immunohistochemical evaluation of ERG expression in various benign and malignant tissues

Haiyan Liu*, Jianhui Shi, Myra Wilkerson, Ximing J Yang, Fan Lin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

The transmembrane protease, serine 2-E twenty-six related gene (TMPRSS2-ERG) fusion leading to ERG overexpression, was detected in approximately 50% of prostate cancers (ranging from 35-70%). However, the published data on ERG expression in tumors from other organs and normal tissues were limited. In this study, we investigated the expression of ERG in TMA sections of various normal tissues (N=452) and carcinomas (N=1,129) from various organs, including 90 cases of low to intermediate-grade (L-MG) prostatic adenocarcinomas and 36 cases of high-grade (HG) prostatic adenocarcinomas, using a single immunostaining system (Dako). Also included were prostatic biopsies of radiation atypia (N=20), atrophy (N=20), and high-grade prostatic intraepithelial lesion (HGPIN) (N=18). ERG expression was detected in 44% (40/90) of L-MG prostatic adenocarcinomas; in 22% (8/36) of HG prostatic adenocarcinomas; and in 22% (4/18) of HGPIN. No ERG expression was detected in non-prostate carcinomas, normal tissues including prostate and seminal vesicles, benign prostatic tissue with radiation atypia, and atrophy. Our data demonstrate that ERG is a highly specific marker, which may have important implications in the interpretation of prostate biopsies with limited cancers. In addition, its high diagnostic specificity may be useful in identifying a prostatic primary when working on a tumor of uncertain origin.

Original languageEnglish (US)
Pages (from-to)3-9
Number of pages7
JournalAnnals of Clinical and Laboratory Science
Volume43
Issue number1
StatePublished - Mar 21 2013

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Immunology and Allergy
  • Hematology
  • Medical Laboratory Technology
  • Microbiology
  • Molecular Biology
  • Clinical Biochemistry
  • Immunology

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