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Effectiveness of Breast-Conserving Surgery and 3-Dimensional Conformal Partial Breast Reirradiation for Recurrence of Breast Cancer in the Ipsilateral Breast: The NRG Oncology/RTOG 1014 Phase 2 Clinical Trial.
JAMA Oncology ( IF 28.4 ) Pub Date : 2019-11-21 , DOI: 10.1001/jamaoncol.2019.4320
Douglas W Arthur 1 , Kathryn A Winter 2 , Henry M Kuerer 3 , Bruce Haffty 4 , Laurie Cuttino 1 , Dorin A Todor 1 , Pramila Rani Anne 5 , Penny Anderson 6 , Wendy A Woodward 3 , Beryl McCormick 7 , Sally Cheston 8 , Walter M Sahijdak 9 , Daniel Canaday 10 , Doris R Brown 11 , Adam Currey 12 , Christine M Fisher 13 , Reshma Jagsi 14 , Jennifer Moughan 2 , Julia R White 15
Affiliation  

Importance Mastectomy is standard for recurrence of breast cancer after breast conservation therapy with whole breast irradiation. The emergence of partial breast irradiation led to consideration of its application for reirradiation after a second lumpectomy for treatment of recurrence of breast cancer in the ipsilateral breast. Objectives To assess the effectiveness and adverse effects of partial breast reirradiation after a second lumpectomy and whether the treatment is an acceptable alternative to mastectomy. Design, Setting, and Participants The NRG Oncology/Radiation Therapy Oncology Group 1014 trial is a phase 2, single-arm, prospective clinical trial of 3-dimensional, conformal, external beam partial breast reirradiation after a second lumpectomy for recurrence of breast cancer in the ipsilateral breast after previous whole breast irradiation. The study opened on June 4, 2010, and closed June 18, 2013. Median follow-up was 5.5 years. This analysis used all data received at NRG Oncology through November 18, 2018. Eligible patients experienced a recurrence of breast tumor that was less than 3 cm and unifocal in the ipsilateral breast more than 1 year after breast-conserving therapy with whole breast irradiation and who had undergone excision with negative margins. Interventions Adjuvant partial breast reirradiation, 1.5 Gy twice daily for 30 treatments during 15 days (45 Gy), using a 3-dimensional conformal technique. Main Outcomes and Measures The main outcomes of the present study were the predefined secondary study objectives of recurrence of breast cancer in the ipsilateral breast, late adverse events (>1 year after treatment), mastectomy incidence, distant metastasis-free survival, overall survival, and circulating tumor cell incidence. Results A total of 65 women were enrolled, with 58 evaluable for analysis (mean [SD] age, 65.12 [9.95] years; 48 [83%] white). Of the recurrences of breast cancer in the ipsilateral breast, 23 (40%) were noninvasive and 35 (60%) were invasive. In all 58 patients, 53 (91%) had tumors 2 cm or smaller. All tumors were clinically node negative. A total of 44 patients (76%) tested positive for estrogen receptor, 33 (57%) for progesterone receptor, and 10 (17%) for ERBB2 (formerly HER2 or HER2/neu) overexpression. Four patients had breast cancer recurrence, with a 5-year cumulative incidence of 5% (95% CI, 1%-13%). Seven patients underwent ipsilateral mastectomies for a 5-year cumulative incidence of 10% (95% CI, 4%-20%). Both distant metastasis-free survival and overall survival rates were 95% (95% CI, 85%-98%). Four patients (7%) had grade 3 and none had grade 4 or higher late treatment adverse events. Conclusions and Relevance For patients experiencing recurrence of breast cancer in the ipsilateral breast after lumpectomy and whole breast irradiation, a second breast conservation was achievable in 90%, with a low risk of re-recurrence of cancer in the ipsilateral breast using adjuvant partial breast reirradiation. This finding suggests that this treatment approach is an effective alternative to mastectomy.

中文翻译:

保乳手术和 3 维适形部分乳房再照射治疗同侧乳房乳腺癌复发的有效性:NRG 肿瘤学/RTOG 1014 2 期临床试验。

重要性 乳房切除术是全乳照射保乳治疗后乳腺癌复发的标准方法。部分乳房照射的出现导致考虑将其应用于第二次乳房切除术后再照射以治疗同侧乳房乳腺癌复发。目的 评估第二次乳房切除术后部分乳房再照射的有效性和不良反应,以及该治疗是否是乳房切除术的可接受替代方案。设计、设置和参与者 NRG 肿瘤学/放射治疗肿瘤学组 1014 试验是一项 2 期、单臂、3 维、适形、在第二次乳房切除术后进行外部束部分乳房再照射,以治疗先前全乳照射后同侧乳房复发的乳腺癌。该研究于 2010 年 6 月 4 日开始,并于 2013 年 6 月 18 日结束。中位随访时间为 5.5 年。该分析使用了截至 2018 年 11 月 18 日在 NRG Oncology 收到的所有数据。符合条件的患者在接受全乳照射的保乳治疗 1 年多后经历了小于 3 厘米且单灶性同侧乳房的乳房肿瘤复发,并且谁已进行了负切缘的切除术。干预 辅助部分乳房再照射,1.5 Gy,每天两次,在 15 天内(45 Gy)进行 30 次治疗,使用 3 维适形技术。主要成果和措施 本研究的主要成果是预先确定的次要研究目标,即同侧乳房乳腺癌复发、晚期不良事件(治疗后 > 1 年)、乳房切除术发生率、无远处转移生存期、总生存期、和循环肿瘤细胞的发生率。结果共纳入 65 名女性,其中 58 名可评估用于分析(平均 [SD] 年龄,65.12 [9.95] 岁;48 [83%] 白人)。在同侧乳房的乳腺癌复发中,23 例(40%)为非侵袭性,35 例(60%)为侵袭性。在所有 58 名患者中,53 名 (91%) 的肿瘤直径为 2 cm 或更小。所有肿瘤均为临床淋巴结阴性。共有 44 名患者 (76%) 的雌激素受体检测呈阳性,33 名 (57%) 的孕激素受体检测呈阳性,10 名 (17%) 的 ERBB2(原 HER2 或 HER2/neu)过表达。4 名患者出现乳腺癌复发,5 年累积发病率为 5%(95% CI,1%-13%)。7 名患者接受了同侧乳房切除术,5 年累积发生率为 10%(95% CI,4%-20%)。无远处转移生存率和总生存率均为95%(95% CI,85%-98%)。4 名患者 (7%) 有 3 级,没有人有 4 级或更高的晚期治疗不良事件。结. 这一发现表明,这种治疗方法是乳房切除术的有效替代方法。5 年累积发病率为 5%(95% CI,1%-13%)。7 名患者接受了同侧乳房切除术,5 年累积发生率为 10%(95% CI,4%-20%)。无远处转移生存率和总生存率均为95%(95% CI,85%-98%)。4 名患者 (7%) 有 3 级,没有人有 4 级或更高的晚期治疗不良事件。结. 这一发现表明,这种治疗方法是乳房切除术的有效替代方法。5 年累积发病率为 5%(95% CI,1%-13%)。7 名患者接受了同侧乳房切除术,5 年累积发生率为 10%(95% CI,4%-20%)。无远处转移生存率和总生存率均为95%(95% CI,85%-98%)。4 名患者 (7%) 有 3 级,没有人有 4 级或更高的晚期治疗不良事件。结. 这一发现表明,这种治疗方法是乳房切除术的有效替代方法。7 名患者接受了同侧乳房切除术,5 年累积发生率为 10%(95% CI,4%-20%)。无远处转移生存率和总生存率均为95%(95% CI,85%-98%)。4 名患者 (7%) 有 3 级,没有人有 4 级或更高的晚期治疗不良事件。结. 这一发现表明,这种治疗方法是乳房切除术的有效替代方法。7 名患者接受了同侧乳房切除术,5 年累积发生率为 10%(95% CI,4%-20%)。无远处转移生存率和总生存率均为95%(95% CI,85%-98%)。4 名患者 (7%) 有 3 级,没有人有 4 级或更高的晚期治疗不良事件。结. 这一发现表明,这种治疗方法是乳房切除术的有效替代方法。85%-98%)。4 名患者 (7%) 有 3 级,没有人有 4 级或更高的晚期治疗不良事件。结. 这一发现表明,这种治疗方法是乳房切除术的有效替代方法。85%-98%)。4 名患者 (7%) 有 3 级,没有人有 4 级或更高的晚期治疗不良事件。结. 这一发现表明,这种治疗方法是乳房切除术的有效替代方法。使用辅助性部分乳房再照射,同侧乳房癌症复发的风险较低。这一发现表明,这种治疗方法是乳房切除术的有效替代方法。使用辅助性部分乳房再照射,同侧乳房癌症复发的风险较低。这一发现表明,这种治疗方法是乳房切除术的有效替代方法。
更新日期:2020-01-09
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