PMID- 22678158 OWN - NLM STAT- MEDLINE DCOM- 20121123 LR - 20220317 IS - 1573-7217 (Electronic) IS - 0167-6806 (Linking) VI - 134 IP - 2 DP - 2012 Jul TI - HER-2 gene amplification by fluorescence in situ hybridization (FISH) compared with immunohistochemistry (IHC) in breast cancer: a study of 528 equivocal cases. PG - 743-9 LID - 10.1007/s10549-012-2101-x [doi] AB - The concordance rate between fluorescence in situ hybridization (FISH) and immunohistochemistry (IHC) on evaluating HER-2/neu status is still controversial, especially for the IHC 2+/equivocal cases. In this study, we investigated the amplification of HER-2/neu gene by FISH in IHC (2+)/equivocal specimens to clarify the correlation between HER-2/neu and clinicopathologic features of breast cancers. HER-2/neu amplification was determined by FISH on 528 specimens of breast carcinomas with equivocal expression of HER-2/neu protein by IHC detection. 65.5 % of IHC 2+ patients were negative for HER-2/neu amplification, 29.0 % were positive and the remaining was equivocal. A statistically significant inverse association was found between hormone receptor expression and HER-2/neu amplification (P < 0.05). Furthermore, polysomy of CEP17 was detected in 60 % of breast carcinomas. The results highlight the necessity of FISH test for further categorization when breast carcinoma cases are scored 2+ by IHC. FAU - Zhang, Han AU - Zhang H AD - Department of Pathology, the First Affiliated Hospital of Zhejiang University, Qingchun Road 79#, Hangzhou, Zhejiang, China. z8354335@yahoo.com.cn FAU - Ren, Guoping AU - Ren G FAU - Wang, Xiaoling AU - Wang X FAU - Zhao, Jing AU - Zhao J FAU - Yao, Hongtian AU - Yao H FAU - Bai, Yanfeng AU - Bai Y FAU - Bo, Wang AU - Bo W LA - eng PT - Comparative Study PT - Journal Article DEP - 20120608 PL - Netherlands TA - Breast Cancer Res Treat JT - Breast cancer research and treatment JID - 8111104 RN - EC 2.7.10.1 (ERBB2 protein, human) RN - EC 2.7.10.1 (Receptor, ErbB-2) SB - IM MH - Adult MH - Aged MH - Breast Neoplasms/diagnosis/genetics/*metabolism MH - Carcinoma/diagnosis/genetics/*metabolism MH - Chromosomes, Human, Pair 17 MH - Female MH - *Gene Amplification MH - Gene Dosage MH - Humans MH - Immunohistochemistry MH - In Situ Hybridization, Fluorescence MH - Middle Aged MH - Receptor, ErbB-2/*genetics EDAT- 2012/06/09 06:00 MHDA- 2012/12/10 06:00 CRDT- 2012/06/09 06:00 PHST- 2012/04/07 00:00 [received] PHST- 2012/05/16 00:00 [accepted] PHST- 2012/06/09 06:00 [entrez] PHST- 2012/06/09 06:00 [pubmed] PHST- 2012/12/10 06:00 [medline] AID - 10.1007/s10549-012-2101-x [doi] PST - ppublish SO - Breast Cancer Res Treat. 2012 Jul;134(2):743-9. doi: 10.1007/s10549-012-2101-x. Epub 2012 Jun 8.