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Post-mastectomy radiotherapy can improve survival in breast cancer patients aged 35 years or younger with four or more positive nodes but not in one to three positive nodes

Authors Wu S, Li Q, Zhou J, Sun J, Li F, Lin Q, He Z

Received 25 June 2014

Accepted for publication 5 August 2014

Published 9 October 2014 Volume 2014:10 Pages 867—874

DOI https://doi.org/10.2147/TCRM.S69997

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 3

Editor who approved publication: Professor Garry Walsh

Sangang Wu,1,* Qun Li,2,* Juan Zhou,3,* Jiayuan Sun,2 Fengyan Li,2 Qin Lin,1 Zhenyu He2

1Xiamen Cancer Center, Department of Radiation Oncology, the First Affiliated Hospital of Xiamen University, Xiamen, 2State Key Laboratory of Oncology in Southern China, Department of Radiation Oncology, Sun Yat-Sen University Cancer Center, Guangzhou, 3Xiamen Cancer Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Xiamen University, Xiamen, People’s Republic of China

*These authors contributed equally to this work

Introduction: This retrospective study investigated the clinical value of post-mastectomy radiotherapy (PMRT) in female Chinese breast cancer patients aged 35 years or younger with positive axillary lymph nodes after mastectomy.
Methods: We performed an analysis of clinical pathological data from 221 female Chinese breast cancer patients aged 35 years or younger treated between 1998 and 2007. Patients were diagnosed with positive axillary lymph nodes and underwent mastectomy. PMRT was delivered to 92 patients.
Results: The median follow-up was 61 months. The 5-year locoregional recurrence-free survival (LRFS), distant metastasis-free survival (DMFS), disease-free survival (DFS), and overall survival (OS) were 84.1%, 65.2%, 61.4%, and 77.2%, respectively. Univariate survival analysis (P=0.003) and multivariate analysis (P<0.001) both suggested that PMRT is an independent prognostic factor of LRFS. PMRT positively affected LRFS (P=0.003), but had no significant impact on DMFS (P=0.429), DFS (P=0.146), and OS (P=0.750). PMRT improved LRFS (P=0.001), DFS (P=0.017), and OS (P=0.042) in patients with four or more positive nodes, but no survival benefit was observed in patients with one to three positive nodes (P>0.05).
Conclusion: PMRT can improve survival in breast cancer patients aged 35 years or younger with four or more positive nodes but not in those with one to three positive nodes.

Keywords: breast cancer, radiation therapy, mastectomy, young age, locoregional recurrence
 

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