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2022 ASCO:内分泌疗法±辅助化疗治疗ER+HER2-老年乳腺癌患者的长期预后

2022-06-01 MedSci原创 MedSci原创

ER+HER2-高GGI的乳腺癌患者术后内分泌治疗的基础上加用辅助化疗不能进一步改善生存预后。

对于年龄≥70岁且雌激素受体阳性 (ER+) HER2 阴性(HER2-)的乳腺癌患者,辅助化疗(CT)加用内分泌治疗(ET)的效益仍存在争议。

在这项大型前瞻性临床试验中,研究人员首次评估了所有患者的肿瘤基因组分级指数(GGI),同时比较了高 GGI 的随机乳腺癌患者采用 CT+ET 联合或单用 ET 治疗的预后。

患者纳入条件:≥70岁、ER+HER2-、采用辅助治疗、原发性乳腺癌或独立的局部复发性乳腺癌女性患者。基线时收集患者的 G8 评分、查尔森合并症指数(CCI)和 4 年死亡 Lee 评分。通过 RT-PCR 分析石蜡包埋组织样本的 GGI。低 GGI 的患者不推荐接受 CT 治疗,纳入观察队列进行随访。高 GGI 患者被随机(1:1)分至 CT+ET 组或单用 ET 组,同时根据 G8、pN 和中心进行分层。三个 CT 方案可用(由研究人员选择):4 个疗程的阿霉素/环磷酰胺、非聚乙二醇化脂质体阿霉素/环磷酰胺、多西他赛/环磷酰胺。标准 ET 方案包括 5 年芳香酶抑制剂、他莫昔芬。主要终点是总生存率(OS)。

2012年4月至2016年5月,共招募了1969位患者,其中1089位(55%)被随机分至 CE+ET 组或单用 ET 组。截止2021年12月17日,中位随访了5.8年,共观察到180例 OS 事件。受试患者中位年龄为 75岁(70-92岁),60%的患者 G8 评分>14,62%的患者 CCI ≤2,84%的患者的 Lee 评分≤8。肿瘤≥pT2、pN+、孤立局部复发、组织学分级为 III 级的病例分别占56%、46%、11%和39%。

各治疗组间的 OS 无显著差异(HR 0.85,p=0.2538);CE+ET 组和单用 ET 组的 4 年 OS 分别是 90.5%和 89.7%。亚组分析未发现两治疗组的 OS 存在明显差异。

总之,该研究显示,ER+HER2- 高 GGI 的乳腺癌患者在术后内分泌治疗的基础上加用辅助化疗并不能进一步显著改善总生存率。

 

原始出处:

Final results from a phase III randomized clinical trial of adjuvant endocrine therapy ± chemotherapy in women ≥ 70 years old with ER+ HER2- breast cancer and a high genomic grade index: The Unicancer ASTER 70s trial.First Author: Etienne Brain, Institut Curie, Saint-Cloud, France.

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    2023-04-22 gwc392
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    2022-09-25 quxin068
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    2022-11-06 luwei00
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