Cancer Res Treat.  2018 Jan;50(1):275-282. 10.4143/crt.2017.041.

No Association of Positive Superficial and/or Deep Margins with Local Recurrence in Invasive Breast Cancer Treated with Breast-Conserving Surgery

Affiliations
  • 1Department of Surgery, Hanyang University College of Medicine, Seoul, Korea.
  • 2Division of Breast and Endocrine Surgery, Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea. jjjongwr@hanmail.net
  • 3Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
  • 4Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
  • 5Department of Radiation Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.

Abstract

PURPOSE
We evaluated the effect of positive superficial and/or deep margin status on local recurrence (LR) in invasive breast cancer treated with breast-conserving surgery (BCS) followed by radiotherapy.
MATERIALS AND METHODS
In total, 3,403 stage 1 and 2 invasive breast cancer patients treated with BCS followed by radiotherapy from January 2000 to December 2008 were included in this study. These patients were divided into three groups according to margin status: clear resection margin status for all sections (group 1, n=3,195); positive margin status in superficial and/or deep sections (group 2, n=121); and positive peripheral parenchymal margin regardless of superficial and/or deep margin involvement (group 3, n=87). The LR-free survival between these three groups was compared and the prognostic role of margin status was analyzed.
RESULTS
Across all groups, age, tumor size, nodal status, and human epidermal growth factor receptor 2 status did not significantly differ. High grade, positive extensive intraductal component, hormone receptor positivity, hormone therapy received, and chemotherapy not received were more prevalent in groups 2 and 3 than in group 1. Five-year LR rates in groups 1, 2, and 3 were 1.9%, 1.7%, and 7.7%, respectively. Multivariate analysis revealed that group 3 was a significant predictor for LR (hazard ratio [HR], 4.78; p < 0.001), but that positive superficial and/or deep margin was not (HR, 0.66; p=0.57).
CONCLUSION
Superficial and/or deep margin involvement following BCS is not an important predictor for LR.

Keyword

Local neoplasm recurrence; Margins of excision; Segmental mastectomy

MeSH Terms

Breast Neoplasms*
Breast*
Drug Therapy
Humans
Mastectomy, Segmental*
Multivariate Analysis
Neoplasm Recurrence, Local
Radiotherapy
Receptor, Epidermal Growth Factor
Recurrence*
Receptor, Epidermal Growth Factor

Figure

  • Fig. 1. Overview of the study population comprised of primary breast cancer patients.

  • Fig. 2. Kaplan-Meier plots of local recurrence-free survival and breast cancer-specific survival according to margin status.


Reference

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