PMID- 35285011 OWN - NLM STAT- MEDLINE DCOM- 20221010 LR - 20221011 IS - 1699-5848 (Electronic) IS - 0213-3911 (Linking) VI - 37 IP - 8 DP - 2022 Aug TI - A comparative clinicopathological and survival analysis of synchronous bilateral breast cancers. PG - 791-802 LID - 10.14670/HH-18-449 [doi] AB - OBJECTIVE: The present study aimed to explore the clinicopathological characteristics, potential heterogeneity and prognostic factors in synchronous bilateral breast cancer (SBBC). METHODS: We performed a retrospective review and paired comparison of the clinicopathological characteristics of 114 patients with SBBC in the Peking Union Medical College Hospital from January 2008 to September 2019. The prognostic significance of triple negativity status and coexistence ductal carcinoma in situ (DCIS) with bilateral invasive ductal carcinomas of no special type (IDC-NST) was analyzed in SBBC. RESULTS: Most bilateral lesions on both sides were of IDC-NST, grade 2, luminal subtype, and stage I. Although most lesions were concordant between the left and right side, discordances were observed in histological type (25 cases, 21.9%), histological grade (31 cases, 27.2%), pTNM (61 cases, 53.5%), molecular subtypes (20 cases, 17.5%), and immunohistochemical staining of ER (18 cases, 15.8%), PR (26 cases, 22.8%), and HER2 (12 cases, 10.5%). Moreover, there was no significant difference in disease-free survival (DFS) and overall survival (OS) between IDC-NST with coexisting DCIS on both sides and IDC-NST with coexisting DCIS on one side or pure IDC-NST. SBBC with triple negativity on both sides exhibited a significantly shorter DFS and OS when compared with triple negativity on one side or non-triple negativity on both sides (p<0.001), and remained an independent prognostic factor by multivariate analysis. CONCLUSIONS: A considerable proportion of discordance in clinicopathological characteristics is observed in SBBC, supporting the necessity of comprehensive pathological examination including immunohistochemical testing on both sides in clinical practice. Moreover, SBBC with triple negativity on both sides is a prognostic for poor survival. CI - (c)The Author(s) 2022. Open Access. This article is licensed under a Creative Commons CC-BY International License. FAU - Bai, Yan AU - Bai Y AD - Department of Pathology, State Key Laboratory of Complex Severe and Rare Disease, Molecular Pathology Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China. FAU - Lu, Junliang AU - Lu J AD - Department of Pathology, State Key Laboratory of Complex Severe and Rare Disease, Molecular Pathology Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China. FAU - Wu, Huanwen AU - Wu H AD - Department of Pathology, State Key Laboratory of Complex Severe and Rare Disease, Molecular Pathology Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China. FAU - Wang, Jing AU - Wang J AD - Department of Pathology, State Key Laboratory of Complex Severe and Rare Disease, Molecular Pathology Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China. FAU - Niu, Yiru AU - Niu Y AD - Department of Pathology, State Key Laboratory of Complex Severe and Rare Disease, Molecular Pathology Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China. AD - Department of Pathology, China-Japan Friendship Hospital, Beijing, China. FAU - Pang, Junyi AU - Pang J AD - Department of Pathology, State Key Laboratory of Complex Severe and Rare Disease, Molecular Pathology Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China. FAU - Wu, Shafei AU - Wu S AD - Department of Pathology, State Key Laboratory of Complex Severe and Rare Disease, Molecular Pathology Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China. FAU - Liu, Yuanyuan AU - Liu Y AD - Department of Pathology, State Key Laboratory of Complex Severe and Rare Disease, Molecular Pathology Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China. FAU - Liang, Zhiyong AU - Liang Z AD - Department of Pathology, State Key Laboratory of Complex Severe and Rare Disease, Molecular Pathology Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China. liangzhiyong1220@yahoo.com. LA - eng GR - 2016-I2M-1-002/CAMS Innovation Fund for Medical Sciences/ PT - Journal Article DEP - 20220314 PL - Spain TA - Histol Histopathol JT - Histology and histopathology JID - 8609357 SB - IM MH - *Breast Neoplasms/pathology MH - *Carcinoma, Ductal, Breast/pathology MH - *Carcinoma, Intraductal, Noninfiltrating/pathology MH - Disease-Free Survival MH - Female MH - Humans MH - Prognosis MH - Survival Analysis EDAT- 2022/03/15 06:00 MHDA- 2022/10/12 06:00 CRDT- 2022/03/14 06:02 PHST- 2022/03/15 06:00 [pubmed] PHST- 2022/10/12 06:00 [medline] PHST- 2022/03/14 06:02 [entrez] AID - HH-18-449 [pii] AID - 10.14670/HH-18-449 [doi] PST - ppublish SO - Histol Histopathol. 2022 Aug;37(8):791-802. doi: 10.14670/HH-18-449. Epub 2022 Mar 14.