Comparison of 5-year oncological outcomes of breast cancer based on surgery type

A standardized classification system for breast surgery that incorporates oncoplastic techniques is needed. We classified the surgical techniques for breast cancer treatment into five groups according to the extent of surgery and reconstructive methods, i.e. conventional breast-conserving surgery, partial mastectomy with volume displacement, partial mastectomy with volume replacement, simple mastectomy and total mastectomy with immediate reconstruction. We then evaluated the oncological outcomes for each of the five groups.

We analysed clinical data and 5-year oncological results from patients with breast cancer who underwent breast surgery with reconstruction between 2008 and 2013. Local recurrence, distant metastasis and overall survival were investigated.

In total, 1469 patients had 1504 breast surgeries performed with a mean follow-up of 72.40 ± 16.76 months. There were 35 cases (2.3%) of locoregional recurrence and 85 cases (5.7%) of distant metastasis, and the 5-year overall survival rate was 98.6%. No statistically significant differences were observed in local recurrence, distant metastasis or death among the five surgical technique groups (P = 0.218, 0.518 and 0.450, respectively).

Oncological outcomes among all patients and within each surgical technique group were excellent during the 5-year follow-up period. No significant differences in oncological results were observed among the five surgical technique groups.