PMID- 21707704 OWN - NLM STAT- MEDLINE DCOM- 20111019 LR - 20220519 IS - 1365-2559 (Electronic) IS - 0309-0167 (Linking) VI - 58 IP - 7 DP - 2011 Jun TI - Relevance of cohort design for studying the frequency of the ERG rearrangement in prostate cancer. PG - 1028-36 LID - 10.1111/j.1365-2559.2011.03862.x [doi] AB - AIMS: ERG rearrangements, mostly resulting in TMPRSS2-ERG fusions, are frequent alterations in prostate cancer (PCa), with a frequency ranging from 15% to 78%. As the reason for this variability is unknown, our aim was to investigate the ERG rearrangement frequency with a cohort design. METHODS AND RESULTS: We assessed three well-defined cohorts for ERG rearrangements, using fluorescence in situ hybridization (FISH). The first cohort comprised 119 prostatectomy specimens. The second and third cohorts included incidentally diagnosed PCa [71 cystoprostatectomy specimens, and 105 transurethral resection of the prostate (TURP) specimens]. Seventy of 119 (59%) cases of the prostatectomy cohort harboured ERG rearrangements. Regarding zonal origin, 2/11 (18%) transition zone (TZ) foci and 75/145 (52%) peripheral zone (PZ) foci harboured ERG rearrangements. Within the cystoprostatectomies, 24/71 (34%) cases harboured ERG rearrangements. Regarding zonal origin, 2/9 (22%) TZ foci and 26/86 (30%) PZ foci harboured ERG rearrangements. PCa incidentally identified by TURP harboured ERG rearrangements in 31/105 (29%) cases. CONCLUSIONS: ERG rearrangements occur in TZ PCa, although at a lower frequency than in PZ PCa. We confirmed that approximately half of all prostatectomies harbour ERG rearrangements. However, the frequency in incidentally diagnosed PCa cohorts was significantly lower, even if multifocality was considered. Consequently, zonal origin and cohort design are key for studying the clinical implications of ERG rearrangements. CI - (c) 2011 Blackwell Publishing Limited. FAU - Braun, Martin AU - Braun M AD - Institute of Pathology, Comprehensive Cancer Centre, University Hospital of Tuebingen, Tuebingen, Germany. FAU - Scheble, Veit J AU - Scheble VJ FAU - Menon, Roopika AU - Menon R FAU - Scharf, Gregor AU - Scharf G FAU - Wilbertz, Theresia AU - Wilbertz T FAU - Petersen, Karen AU - Petersen K FAU - Beschorner, Christine AU - Beschorner C FAU - Reischl, Markus AU - Reischl M FAU - Kuefer, Rainer AU - Kuefer R FAU - Schilling, David AU - Schilling D FAU - Stenzl, Arnulf AU - Stenzl A FAU - Kristiansen, Glen AU - Kristiansen G FAU - Rubin, Mark A AU - Rubin MA FAU - Fend, Falko AU - Fend F FAU - Perner, Sven AU - Perner S LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Histopathology JT - Histopathology JID - 7704136 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) RN - EC 3.4.21.- (Serine Endopeptidases) RN - EC 3.4.21.- (TMPRSS2 protein, human) SB - IM MH - Adenocarcinoma/*genetics/pathology MH - Cohort Studies MH - Gene Fusion MH - *Gene Rearrangement MH - Humans MH - In Situ Hybridization, Fluorescence MH - Male MH - Oncogene Proteins, Fusion/genetics MH - Prostatectomy MH - Prostatic Neoplasms/*genetics/pathology MH - Research Design MH - Serine Endopeptidases/genetics MH - Trans-Activators/*genetics MH - Transcriptional Regulator ERG EDAT- 2011/06/29 06:00 MHDA- 2011/10/20 06:00 CRDT- 2011/06/29 06:00 PHST- 2011/06/29 06:00 [entrez] PHST- 2011/06/29 06:00 [pubmed] PHST- 2011/10/20 06:00 [medline] AID - 10.1111/j.1365-2559.2011.03862.x [doi] PST - ppublish SO - Histopathology. 2011 Jun;58(7):1028-36. doi: 10.1111/j.1365-2559.2011.03862.x.