Winhestr等报告，利用国家癌症资料库的大量资料，对行保留乳房手术（乳房区段切除，腋淋巴结清扫加放疗）或改变乳腺癌根治术的I、n期乳腺癌患者，术后生存‘情况进行回顾性对比，结果发现两者生存率大致相似。按临床分期、确诊时年龄、肿瘤大小、组织学分级和全身治疗的使用 Winhestr et al. reported that patients with stage I and stage n breast cancer who had breast cancer surgery (breast segment resection, axillary lymph node dissection and radiotherapy) or radical mastectomy were managed using a large amount of data from the National Cancer Database. Retrospective comparisons found that the two survival rates were roughly similar. Clinical stage, age at diagnosis, tumor size, histological grade, and use of systemic therapy