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Comparisons of Oncologic Outcomes between Triple-Negative Breast Cancer (TNBC) and Non-TNBC among Patients Treated with Breast-Conserving Therapy

 Sanghwa Kim  ;  Hyung Seok Park  ;  Jee Ye Kim  ;  Jegyu Ryu  ;  Seho Park  ;  Seung Il Kim 
 YONSEI MEDICAL JOURNAL, Vol.57(5) : 1192-1198, 2016 
Journal Title
Issue Date
Adult ; Aged ; Breast Neoplasms/mortality ; Breast Neoplasms/pathology ; Breast Neoplasms/surgery* ; Disease-Free Survival ; Female ; Humans ; Mastectomy, Segmental* ; Middle Aged ; Neoplasm Recurrence, Local*/mortality ; Neoplasm Recurrence, Local*/pathology ; Proportional Hazards Models ; Retrospective Studies ; Time Factors ; Treatment Outcome ; Triple Negative Breast Neoplasms/mortality ; Triple Negative Breast Neoplasms/pathology ; Triple Negative Breast Neoplasms/surgery*
Breast neoplasms ; mastectomy, segmental ; triple negative breast neoplasms
PURPOSE: The optimum local surgical strategy regarding breast-conserving therapy (BCT) for triple-negative breast cancer (TNBC) is controversial. To investigate whether BCT is appropriate for patients with TNBC, we evaluated the clinical outcomes of BCT in women with TNBC compared to those of women without TNBC, using a large, single-center cohort. MATERIALS AND METHODS: We performed a retrospective analysis of 1533 women (TNBC n=321; non-TNBC n=1212) who underwent BCT for primary breast cancer between 2000 and 2010. Clinicopathological characteristics, locoregional recurrence-free survival (LRFS), and overall survival (OS) were analyzed. RESULTS: Tumors from the TNBC group had a higher T stage (T2 37.4% vs. 21.0%, p<0.001), a lower N stage (N0 86.9% vs. 75.5%, p<0.001), and a higher histologic grade (Grade III 66.8% vs. 15.4%, p<0.001) than the non-TNBC group. There were no differences in 5-year LRFS rates between the TNBC and non-TNBC groups (98.7% vs. 97.8%, p=0.63). The non-TNBC group showed a slightly better 5-year OS than the TNBC group; however, the difference was not significant (96.2% vs. 97.3%, p=0.72). In multivariate analyses, TNBC was not associated with poor clinical outcomes in terms of LRFS and OS [hazard ratio (HR) for LRFS=0.37, 95% confidence interval (CI): 0.10-1.31; HR for OS=1.03, 95% CI: 0.31-3.39]. CONCLUSION: TNBC patients who underwent BCT showed non-inferior locoregional recurrence compared to non-TNBC patients with BCT. Thus, BCT is an acceptable surgical approach in patients with TNBC.
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1. College of Medicine (의과대학) > Dept. of Surgery (외과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Seung Il(김승일)
Park, Se Ho(박세호) ORCID logo https://orcid.org/0000-0001-8089-2755
Park, Hyung Seok(박형석) ORCID logo https://orcid.org/0000-0001-5322-6036
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