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中华乳腺病杂志(电子版) ›› 2023, Vol. 17 ›› Issue (02) : 72 -79. doi: 10.3877/cma.j.issn.1674-0807.2023.02.002

论著

放射治疗对乳腺癌寡转移局部控制的影响
王淑伟(), 殷进军, 邵姜超, 丛秋梅, 王冰   
  1. 264200 山东大学附属威海市立医院放射治疗二科
    264200 山东大学附属威海市立医院科教科
    264400 威海市中心医院肿瘤一科
    264200 山东大学附属威海市立医院药剂科
  • 收稿日期:2022-12-24 出版日期:2023-04-01
  • 通信作者: 王淑伟
  • 基金资助:
    山东省老年医学学会2021年度科技攻关计划项目(LKJGG2021W123)

Influence of radiotherapy intervention on local control of oligometastatic breast cancer

Shuwei Wang(), Jinjun Yin, Jiangchao Shao, Qiumei Cong, Bing Wang   

  1. Second Department of Radiotherapy, Weihai Municipal Hospital, Shandong University, Weihai 264200, China
    Science and Education Section, Weihai Municipal Hospital, Shandong University, Weihai 264200, China
    First Department of Oncology, Weihai Central Hospital, Weihai 264400, China
    Department of Pharmacy, Weihai Municipal Hospital, Shandong University, Weihai 264200, China
  • Received:2022-12-24 Published:2023-04-01
  • Corresponding author: Shuwei Wang
引用本文:

王淑伟, 殷进军, 邵姜超, 丛秋梅, 王冰. 放射治疗对乳腺癌寡转移局部控制的影响[J]. 中华乳腺病杂志(电子版), 2023, 17(02): 72-79.

Shuwei Wang, Jinjun Yin, Jiangchao Shao, Qiumei Cong, Bing Wang. Influence of radiotherapy intervention on local control of oligometastatic breast cancer[J]. Chinese Journal of Breast Disease(Electronic Edition), 2023, 17(02): 72-79.

目的

探讨放射治疗对乳腺癌寡转移患者的预后的影响。

方法

回顾性分析2013年1月1日至2017年6月30日山东大学附属威海市立医院收治的75例乳腺癌术后寡转移患者的临床资料,采用调强/三维适形放射治疗技术对寡转移部位进行放射治疗,生存分析采用Kaplan-Meier法,组间差异比较采用Log-rank检验。全病变放射治疗组及非全病变放射治疗组临床病理特征比较采用χ2检验或Fisher确切概率法。多因素分析采用Cox回归法。

结果

75例乳腺癌寡转移患者中,采用调强放射治疗68例,三维适形放射治疗7例;放射治疗部位骨30例,肺22例,淋巴结19例,脑转移3例,肝转移1例。中位随访时间为42.0个月(32.0~52.0个月),5年OS为65.4%,5年无进展生存率(PFS)为68.6%,5年局部控制率为64.4%。全病变放射治疗组50例,非全病变放射治疗组25例。全病变放射治疗组预后优于非全病变放射治疗组(5年PFS:88.9%比22.0%,χ2=17.381,P<0.001;5年OS:82.5%比22.7%,χ2=15.416,P<0.001;5年局部控制率:87.3%比24.0%,χ2=15.669,P<0.001)。接受不同部位放射治疗的患者5年局部控制率、OS及PFS比较,差异均无统计学意义(χ2=2.462、2.717、0.929,P=0.482、0.437、0.818)。多因素分析显示:全病变放射治疗、组织学分级2级是乳腺癌寡转移患者局部控制率(HR=0.115,95%CI:0.037~0.363,P<0.001;HR=0.138,95%CI:0.029~0.651,P=0.012)、PFS(HR=0.127,95%CI:0.041~0.392,P<0.001;HR=0.150,95%CI:0.034~0.661,P=0.012)、OS(HR=0.144,95%CI:0.047~0.441,P=0.001;HR=0.169,95%CI:0.038~0.754,P=0.020)的独立保护因素;肿块直径<3 cm是局部控制率的独立保护因素(HR=0.265,95%CI:0.092~0.764,P=0.014)。

结论

乳腺癌寡转移全病变放射治疗可以改善患者预后,尤其是对于组织学分级2级和肿块直径<3 cm的患者,可以提高其局部控制率。

Objective

To investigate the effect of radiotherapy on the local control of oligometastatic breast cancer.

Methods

A retrospective analysis was performed on the clinical records of 75 patients with oligometastatic breast cancer after surgery in the Weihai Municipal Hospital, Shandong University from January 1, 2013 to June 30, 2017. All patients underwent intensity modulated radiotherapy or 3D conformal radiotherapy on oligometastatic sites. The Kaplan-Meier method was used for survival analysis and the log-rank test was used for group comparison. χ2 test or Fisher exact text was used to compare clinicopathologic features between the whole lesion radiotherapy group and the non-whole lesion radiotherapy group. The Cox regression was used for multivariate analysis.

Results

Intensity modulated radiotherapy was used in 68 cases and 3D conformal radiotherapy was used in 7 cases. The radiation sites were listed as follow: bone in 30 cases, lung in 22 cases, lymph nodes in 19 cases, brain in 3 cases and liver in one case. The median follow-up was 42.0 months (range: 32.0-52.0 months). The 5-year OS, progression-free survival (PFS) and local control rate (LC) was 65.4%, 68.6% and 64.4%, respectively. Totally 50 cases received the whole lesion radiotherapy and other 25 cases received non-whole lesion radiotherapy. The prognosis of patients in the whole lesion radiotherapy group was significantly better than that in the non-whole lesion radiotherapy group (5-year PFS: 88.9% vs 22.0%, χ2=17.381, P<0.001; 5-year OS: 82.5% vs 22.7%, χ2=15.416, P<0.001; 5-year LC: 87.3% vs 24.0%, χ2=15.669, P<0.001). There were no significant differences in the 5-year LC, OS and PFS between patients receiving radiotherapy on different sites. Multivariate analysis showed that whole lesion radiotherapy and histological grade 2 were independent protective factors for LC (HR=0.115, 95%CI: 0.037-0.363, P<0.001; HR=0.138, 95%CI: 0.029-0.651, P=0.012), PFS(HR=0.127, 95%CI: 0.041-0.392, P<0.001; HR=0.150, 95%CI: 0.034-0.661, P=0.012)and OS(HR=0.144, 95%CI: 0.047-0.441, P=0.001; HR=0.169, 95%CI: 0.038-0.754, P=0.020); tumor diameter<3 cm was an independent protective factor for LC (HR=0.265, 95%CI: 0.092-0.764, P=0.014).

Conclusion

The whole lesion radiotherapy can improve the prognosis of oligometastatic breast cancer and it can increase LC, especially for patients with tumor of histological grade 2 or the diameter <3 cm.

图1 75例乳腺癌寡转移患者的生存曲线 a图为总生存曲线;b图为无进展生存曲线;c图为局部控制率曲线
图2 乳腺癌寡转移全病变放射治疗组及非全病变放射治疗组患者的总生存率比较注:χ2=15.416,P<0.001
图3 乳腺癌寡转移全病变放射治疗组及非全病变放射治疗组患者的无进展生存率比较注:χ2=17.381,P<0.001
图4 乳腺癌寡转移全病变放射治疗组及非全病变放射治疗组患者的局部控制率比较注:χ2=15.669,P<0.001
表1 全病变放射治疗组及非全病变放射治疗组的临床病理特征比较[例(%)]
表2 不同临床病理特征的乳腺癌寡转移患者5年LC、PFS及OS比较
临床病理特征 例数 5年LC(%) χ2 P 5年PFS(%) χ2 P 5年OS(%) χ2 P
是否绝经                    
50 64.1 0.155 0.694 73.3 0.420 0.517 66.5 0.229 0.632
25 58.4 58.6 56.6
临床分期                    
Ⅰ期 8 83.3 0.409 0.815 87.5 0.079 0.961 83.3 0.367 0.832
Ⅱ期 38 66.4 69.4 68.7
Ⅲ期 29 52.4 65.1 55.1
病理分型                    
浸润性导管癌 55 58.0 0.249 0.618 66.0 0.014 0.907 60.9 0.183 0.669
其他类型 20 79.5 78.4 77.4
组织学分级                    
2级 31 88.5 6.783 0.009 89.5 7.902 0.005 89.2 6.813 0.009
3级 44 48.7 54.0 50.6
肿块直径                    
<3 cm 47 72.4 4.751 0.029 77.1 3.690 0.055 70.1 4.042 0.044
≥3 cm 28 49.8 51.8 55.3
激素受体                    
阴性 19 63.0 1.596 0.206 60.5 0.792 0.373 67.7 1.909 0.167
阳性 56 66.2 72.1 66.2
HER-2                    
阴性 58 63.4 0.016 0.900 67.7 0.016 0.900 65.6 0.363 0.547
阳性 17 76.6 77.2 76.6
Ki-67                    
<15% 13 72.9 2.910 0.406 75.5 2.420 0.490 72.7 4.415 0.220
15%~30% 12 66.7 75.0 80.0
>30% 46 70.6 69.9 67.8
不详 4 37.5 37.5 37.5
寡转移放射治疗部位                    
30 66.3 2.462 0.482 69.2 0.929 0.818 66.3 2.717 0.437
22 58.2 65.7 67.8
淋巴结 19 70.4 72.2 59.0
其他 4 75.0 66.7 50.0
全病变放射治疗                    
50 87.3 15.669 <0.001 88.9 17.381 <0.001 82.5 15.416 <0.001
25 24.0 22.0 22.7
累及器官数                    
1个 67 66.4 2.360 0.125 71.1 1.668 0.197 67.9 3.075 0.080
2~3个 8 43.8 45.7 40.0
最终广泛转移                    
46 100 24.304 <0.001 100 36.045 <0.001 100 23.637 <0.001
29 33.4 27.8 35.9
术后内分泌治疗                    
51 80.0 4.733 0.030 85.5 5.323 0.021 81.2 4.481 0.034
24 40.0 39.8 42.0
术后辅助放射治疗                    
28 88.9 5.691 0.017 89.8 4.448 0.035 52.8 5.412 0.020
47 50.6 57.7 88.9
术后辅助化疗                    
71 63.8 0.456 0.499 67.9 0.456 0.499 55.5 0.340 0.560
4 100 100 100
表3 75例乳腺癌寡转移患者LC、PFS、OS的Cox多因素生存分析结果
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