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- ERG Immunohistochemistry and Clinicopathologic Characteristics in Korean Prostate Adenocarcinoma Patients
- Ja Hee Suh, Jeong-Whan Park, Cheol Lee, Kyung Chul Moon
- Korean J Pathol. 2012;46(5):423-428. Published online October 25, 2012
- DOI: https://doi.org/10.4132/KoreanJPathol.2012.46.5.423
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- 33 Download
- 18 Crossref
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Abstract
PDF Background Transmembrane protease serine 2-ETS related gene (
TMPRSS2-ERG ) gene fusion, the most common genetic alternation in prostate cancer, is associated with protein expression of the oncogeneERG . Recently, an immunohistochemical staining method using an anti-ERG antibody was shown to have a strong correlation with altered ERG protein expression.Methods We analyzed a total of 303 radical prostatectomy specimens (obtained from Korean prostate cancer cases) using a constructed tissue microarray and ERG immunohistochemical staining. Thereafter, we evaluated the association between ERG expression and clinicopathological factors.
Results The ERG-positive rate was 24.4% (74/303) and significantly higher ERG expression was observed in the subgroup with a lower Gleason score (p=0.004). Analysis of the histologic pattern of prostate adenocarcinomas revealed that tumors with discrete glandular units (Gleason pattern 3) displayed higher frequency of ERG expression (p=0.016). The ERG-positive rate was lower than that found (approximately 50%) in studies involving western populations. Other factors including age, tumor volume, initial protein-specific antigen level, a pathological stage and margin status were not significantly related with the ERG expression.
Conclusions ERG immunohistochemical staining is significantly higher in tumors with well-formed glands and is associated with a lower Gleason score.
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Citations
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