Fig. 1. Data from the medical records of patients who underwent BCS with axillary staging for treatment of breast cancer by a breast surgeon at Severance Hospital between March 2018 and September 2019 were collected. Records of 302 patients were considered. Exclusion criteria included patients who received only partial mastectomy without axillary staging and special type, such as LCIS or phyllodes tumor. After the application of these criteria, 58 patients were excluded. A total of 244 patients were finally enrolled in the study. CBCS, conventional breast-conserving surgery; SIBCS, single-incision breast-conserving surgery; LCIS, lobular carcinoma in situ.