In general, breast-conserving surgery can be considered for patients with the following characteristics: 1) the lesion is solitary and located in the periphery; 2) the lump should not be too large and the breast should not be significantly deformed after local enlargement; 3) there are no multiple foci located in different quadrants and/or extensive diffuse microcalcifications on preoperative mammogram; 4) there are no tumor cells remaining in each cut edge of the local enlargement specimen and there is no significant deformation of the breast after suture; 5) the patient’s perception of the following factors No significant deformation of the breast; Liang Chunli, Department of General Surgery, Shanghai Oriental Hospital 5. Patients are interested in the following factors 1) long-term survival rate 2) possibility of local recurrence and outcome 3) psychological adjustment, fear of tumor recurrence, adaptation in terms of sexual life, and recovery of physical function. After detailed consideration, the patient still has the desire and requirement to keep the breast.