Department of Radiation Oncology, Faculty of Medicine, University of Toronto, Toronto, Canada.
Department of Radiation Oncology, Sunnybrook Health Sciences Centre, 2075 Bayview Avenue, T2-067, Toronto, Ontario, M4N 3M5, Canada.
BMC Cancer. 2019 Apr 3;19(1):306. doi: 10.1186/s12885-019-5499-2.
BACKGROUND: Neoadjuvant chemotherapy (NAC) is increasingly used to treat locally advanced breast cancer (LABC). Improved response to NAC correlates with better survival outcomes. The dual purpose of this study is to report recurrence and survival outcomes for LABC patients treated with NAC, surgery and adjuvant radiotherapy and to correlate these outcomes with tumour response after NAC using multiple response assessment methods. METHODS: All LABC patients treated for curative intent with NAC, surgery, and adjuvant radiotherapy at our institute between January 2009 and December 2014 were included for analysis. NAC was mostly anthracycline and taxane-based; radiotherapy consisted of 50 Gy to the breast/chest wall and regional lymph nodes. Response to NAC was categorized using synoptic pathology reports, modified-RECIST and Chevallier scores. Survival curves were generated by the Kaplan-Meier method and compared using the log-rank test. RESULTS: The cohort included 103 patients nearly equally divided between Stage II (n = 53) and Stage III (n = 50). Rates of locoregional control (LRC), recurrence-free survival (RFS), and overall survival (OS) were 99, 98, and 100% at 1 year and 89, 69 and 77% at 5 years, respectively. Responses to NAC did not correlate with LRC (p > 0.05) but did correlate with RFS and OS (p < 0.05), except that the Chevallier score did not predict RFS (p = 0.06). Using bivariate Cox modeling tumour size before (p = 0.003) and after (p < 0.001) NAC, stage group (p = 0.05), and response assessed by synoptic pathology (p = 0.05), modified-RECIST (p = 0.001), and Chevallier score (p = 0.015) all predicted for RFS. No factors predicted for LRC. CONCLUSION: Pathologic response by all tested methods correlated with improved survival but were not associated with decreased LRC.
背景:新辅助化疗(NAC)越来越多地用于治疗局部晚期乳腺癌(LABC)。对 NAC 的反应改善与生存结果更好相关。本研究的双重目的是报告接受 NAC、手术和辅助放疗治疗的 LABC 患者的复发和生存结果,并使用多种反应评估方法将这些结果与 NAC 后的肿瘤反应相关联。
方法:本研究纳入了 2009 年 1 月至 2014 年 12 月在我院接受 NAC、手术和辅助放疗治疗的所有 LABC 患者进行分析。NAC 主要基于蒽环类药物和紫杉烷类药物;放疗包括 50Gy 的乳房/胸壁和区域淋巴结。使用综述病理报告、改良 RECIST 和 Chevallier 评分来分类 NAC 的反应。通过 Kaplan-Meier 方法生成生存曲线,并使用对数秩检验进行比较。
结果:队列包括 103 名患者,在 II 期(n=53)和 III 期(n=50)之间几乎平分。1 年时的局部区域控制(LRC)、无复发生存(RFS)和总生存(OS)率分别为 99%、98%和 100%,5 年时分别为 89%、69%和 77%。NAC 的反应与 LRC 无关(p>0.05),但与 RFS 和 OS 相关(p<0.05),但 Chevallier 评分与 RFS 无关(p=0.06)。使用双变量 Cox 建模,在 NAC 前后(p=0.003 和 p<0.001)、肿瘤大小、分期组(p=0.05)、以及通过综述病理(p=0.05)、改良 RECIST(p=0.001)和 Chevallier 评分(p=0.015)评估的反应预测 RFS。没有因素预测 LRC。
结论:所有测试方法的病理反应与改善的生存相关,但与 LRC 降低无关。
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