PMID- 23850495 OWN - NLM STAT- MEDLINE DCOM- 20131119 LR - 20161125 IS - 1532-8392 (Electronic) IS - 0046-8177 (Linking) VI - 44 IP - 10 DP - 2013 Oct TI - Frequent TMPRSS2-ERG rearrangement in prostatic small cell carcinoma detected by fluorescence in situ hybridization: the superiority of fluorescence in situ hybridization over ERG immunohistochemistry. PG - 2227-33 LID - S0046-8177(13)00191-3 [pii] LID - 10.1016/j.humpath.2013.05.005 [doi] AB - Small cell carcinoma of the prostate is both morphologically and immunohistochemically similar to small cell carcinoma of other organs such as the urinary bladder or lung. TMPRSS2-ERG gene fusion appears to be a highly specific alteration in prostatic carcinoma that is frequently shared by small cell carcinoma. In adenocarcinoma, immunohistochemistry for the ERG protein product has been reported to correlate well with the presence of the gene fusion, although in prostatic small cell carcinoma, this relationship is not completely understood. We evaluated 54 cases of small cell carcinoma of the prostate and compared TMPRSS2-ERG gene fusion status by fluorescence in situ hybridization (FISH) to immunohistochemical staining with antibody to ERG. Of 54 cases of prostatic small cell carcinoma, 26 (48%) were positive for TMPRSS2-ERG gene fusion by FISH and 12 (22%) showed overexpression of ERG protein by immunohistochemistry. Of the 26 cases positive by FISH, 11 were also positive for ERG protein by immunohistochemistry. One tumor was positive by immunohistochemistry but negative by FISH. Urinary bladder small cell carcinoma (n = 25) showed negative results by both methods; however, 2 of 14 small cell carcinomas of other organs (lung, head, and neck) showed positive immunohistochemistry but negative FISH. Positive staining for ERG by immunohistochemistry is present in a subset of prostatic small cell carcinomas and correlates with the presence of TMPRSS2-ERG gene fusion. Therefore, it may be useful in confirming prostatic origin when molecular testing is not accessible. However, sensitivity and specificity of ERG immunohistochemistry in small cell carcinoma are decreased compared to FISH. CI - Copyright (c) 2013 Elsevier Inc. All rights reserved. FAU - Schelling, Lindsay A AU - Schelling LA AD - Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, IN 46202, USA. FAU - Williamson, Sean R AU - Williamson SR FAU - Zhang, Shaobo AU - Zhang S FAU - Yao, Jorge L AU - Yao JL FAU - Wang, Mingsheng AU - Wang M FAU - Huang, Jiaoti AU - Huang J FAU - Montironi, Rodolfo AU - Montironi R FAU - Lopez-Beltran, Antonio AU - Lopez-Beltran A FAU - Emerson, Robert E AU - Emerson RE FAU - Idrees, Muhammad T AU - Idrees MT FAU - Osunkoya, Adeboye O AU - Osunkoya AO FAU - Man, Yan-Gao AU - Man YG FAU - Maclennan, Gregory T AU - Maclennan GT FAU - Baldridge, Lee Ann AU - Baldridge LA FAU - Comperat, Eva AU - Comperat E FAU - Cheng, Liang AU - Cheng L LA - eng PT - Comparative Study PT - Journal Article DEP - 20130712 PL - United States TA - Hum Pathol JT - Human pathology JID - 9421547 RN - 0 (Biomarkers, Tumor) RN - 0 (ERG protein, human) RN - 0 (Oncogene Proteins, Fusion) RN - 0 (TMPRSS2-ERG fusion protein, human) RN - 0 (Trans-Activators) RN - 0 (Transcriptional Regulator ERG) SB - IM MH - Adult MH - Aged MH - Aged, 80 and over MH - Biomarkers, Tumor/metabolism MH - Carcinoma, Small Cell/*genetics/metabolism/pathology MH - Gene Expression Regulation, Neoplastic MH - Gene Rearrangement MH - Humans MH - Immunohistochemistry/*methods MH - In Situ Hybridization, Fluorescence/*methods MH - Male MH - Middle Aged MH - Oncogene Proteins, Fusion/*genetics MH - Prostatic Neoplasms/*genetics/metabolism/pathology MH - Trans-Activators/metabolism MH - Transcriptional Regulator ERG OTO - NOTNLM OT - Fluorescence in situ hybridization OT - Histogenesis OT - Molecular genetics OT - Neuroendocrine tumor OT - Prostate OT - Small cell carcinoma OT - TMPRSS2-ERG rearrangement OT - Tumor of unknown origin EDAT- 2013/07/16 06:00 MHDA- 2013/11/20 06:00 CRDT- 2013/07/16 06:00 PHST- 2013/02/28 00:00 [received] PHST- 2013/04/29 00:00 [revised] PHST- 2013/05/01 00:00 [accepted] PHST- 2013/07/16 06:00 [entrez] PHST- 2013/07/16 06:00 [pubmed] PHST- 2013/11/20 06:00 [medline] AID - S0046-8177(13)00191-3 [pii] AID - 10.1016/j.humpath.2013.05.005 [doi] PST - ppublish SO - Hum Pathol. 2013 Oct;44(10):2227-33. doi: 10.1016/j.humpath.2013.05.005. Epub 2013 Jul 12.