Compared with total mastectomy, breast-conserving surgery has no statistical significance in local recurrence rate, tumor-free survival rate and overall survival rate. The results of NSABP B04 show that the effect of simple mastectomy plus postoperative radiotherapy is the same as that of radical mastectomy, suggesting that postoperative radiotherapy may narrow the scope of operation. The clinical randomized controlled trial of Milan Cancer Institute 198 1 year found that there was no difference in survival rate between quadrant resection, axillary lymph node dissection and breast radiotherapy and modified radical mastectomy. In 1985, NSABP reported the preliminary results of its B06 experiment similar to Milan's. The long-term follow-up results of Milan 65438-0990 clinical trial once again show that breast-conserving therapy can be used as one of the treatment methods for early breast cancer, just like radical mastectomy.

Cancer Hospital of China Academy of Medical Sciences reported that the annual survival rate of 206 cases of breast-conserving surgery 10 was 80.0%, and the local recurrence rate of 10 was 7.7%, which was the same as that of foreign reports. In 2002_ 10, The New England Journal of Medicine also published two large random sample follow-up reports on the treatment of early breast cancer. Veronesi et al. showed that the survival rate was 58.3% and 58.8% respectively, and the mortality rate caused by various reasons was 465,438 0.7% in breast-conserving group and 465,438 0.2% in radical treatment group (P = 65,438 0.0). The mortality caused by breast cancer was 26.65438 0% and 24.3% respectively (P = 0.8). Because the long-term survival rate of the two groups is the same, breast-conserving surgery is the first choice for patients with relatively small breast cancer, which also proves the long-term good effect of breast-conserving surgery.