Interpretation of the American Guideline on Margins for Breast- Conserving Surgery in Stages Ⅰ and Ⅱ Invasive Breast Cancer        WU Ke-jin. Department of General Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
Abstract    From February to March in 2014, Society of Surgical Oncology (SSO) and American Society for Radiation Oncology (ASTRO) issued the guideline on margins for beast-conserving surgery in stage I and Ⅱ invasive breast cancer. A multidisciplinary consensus panel developed the guideline. Based on the results of meta-analysis, it is clear that the use of no ink on tumor as the standard for an adequate margin in early invasive breast cancer is reasonable. More widely clear margins than no ink on tumor adopted common in the clinical work is not necessary.