ER和PR及Her-2对改良根治术后腋窝淋巴结阳性乳腺癌放疗疗效的影响

目的 根据ER、PR和Her-2的免疫组化检查结果,把改良根治术后的高危乳腺癌患者分为不同亚组,了解放疗对不同亚组患者的作用.方法 回顾分析437例改良根治术后病理为浸润癌的乳腺癌患者资料,分期为T3-4N1或N2-3期,有ER、PR和Her-2的免疫组化检查结果.408例接受了化疗,352例接受了放疗.ER+或(和)PR+定义为受体阳性(Rec+),ER-和PR-定义和受体阴性(Rec-),Her-2++或+++定义为Her-2阳性(Her-2+).根据结果分为Rec-/Her-2-(69例)、Rec-/Her-2+(62例)、Rec+/Her-2+(89例)和Rec+/Her-2-(217例)组,分别分析4个组在放疗和未放疗下局部区域复发率(LRR)、远处转移率(DM)、无瘤生存率(DFS)和总生存率(OS)的差别.复发率和生存率计算用Kaplan-Meier法,差异检验用Logrank法.结果 中位随访48个月,除外5例放疗不详的患者,资料齐全可分析患者432例.放疗降低了4个组患者的5年LRR,Rec-/Her-2-、Rec-/Her-2+、Rec+/Her-2+和Rec+/Her-2-组放疗和未放疗的5年LRR分别为13.1%和33.3%、9.3%和21.2%、9.7%和47.0%、3.2%和15.4%;对Rec-/Her-2-、Rec-/Her-2+和Rec+/Her-2+患者,放疗降低了5年DM,放疗和未放疗患者的5年DM分别为26.7%和49.2%、27.6%和67.5%、18.4%和100%,并提高5年DFS和OS,三组患者放疗和未放疗的5年DFS分别为66.7%和33.3%、67.7%和33.3%、72.6%和0%,三组患者放疗和未放疗的5年OS分别为73.9%和25.2%、69.8%和41.5%、91.0%和32.8%.结论 不同ER、PR、Her-2状态的改良根治术后高危乳腺癌患者均能从术后放疗中获益.

ER, PR and Her-2 in the prediction of locoregional recurrence in node positive breast cancer treated with mastectomy

Objective To evaluate the role of postmastectomy radiotherapy in four subgroups of high-risk breast cancer patients, who were grouped by the status of estrogen receptor (ER), progesterone receptor (PR) and human epidermal growth factor 2 (Her-2). Methods A total of 437 invasive breast cancer patients with T3-4N1 or N2-3 and available immunohistochemistry results of ER, PR and Her-2 were retrospectively analyzed. Patients were classified into 4 subgroups according to hormone receptors (ER or PR, Rec) and Her-2 status:Rec-/Her-2-(triple negative), Rec-/Her-2 +, Rec +/Her-2 + and Rec +/Her-2-. Rec-was defined as ER-and PR-. Rec + was defined as ER + and/or PR +. Her-2 positive was defined as Her-2 + + or Her-2 + + +. End points were isolated locoregional recurrence (LRR), distant metastasis (DM), disease-free survival (DFS) and overall survival (OS). Results The median follow up time was 48 months. Sixty-nine (15. 8%) patients were Rec-/Her-2-, 62 (14. 2%) Rec-/Her-2 +, 89 (20.4%) Rec +/Her-2 + and 217 (49.7%) Rec +/Her-2-. 480(93.4%) patients received chemotherapy and 352(80. 5%) received radiotherapy. Radiotherapy significantly reduced the 5-year LRR rates of all the four subgroups (Rec-/Her-2-: 13.1% vs. 33. 3%, Rec-/Her-2 + :9. 3% vs. 21.2%, Rec + /Her-2 + :9. 7% vs. 47.0%, Rec +/Her-2-:3. 2% vs. 15.4%). Radiotherapy significantly lowered the 5-year DM rates (26. 7% vs. 49.4%, 27.6% vs. 67. 5%, 18.4% vs. 100%) and improved the 5-year DFS rate (66. 7% vs. 33. 3% , 67.7% vs. 33. 3% , 72. 6% vs. 0%) as well as OS (73.9% vs. 25.2% ,69. 8% vs.41.5%, 91.0% vs. 32. 8%) of patients with Rec-/Her-2-, Rec-/Her-2 + and Rec +/Her-2 +. Conclusions In high-risk breast cancer patients, all subgroups of patients grouped by ER, PR and Her-2 status can benefit from postmastectomy radiotherapy.