The incision margin of breast tissue around primary tumor in BCT is very important for surgeons because a positive margin (breast cancer cells found) can develop local recurrence after operation.

• 在BCT中，原发瘤周围乳腺组织的手术切缘选择极为重要，保证手术切缘阴性(即不存在肿瘤细胞)是防止术后局部复发的关键。