淋巴结(LN)转移和肿瘤大小与乳腺癌患者的生存密切相关。一直以来,淋巴结受累的程度和数目是重要的预后因素,指导着临床选择更可能从辅助治疗中获益的患者。乳腺癌区域淋巴结包括腋窝(Ax)和乳房内淋巴结。以前,清扫乳房内淋巴结和腋窝淋巴结的扩大根治术是乳腺癌的标准手术方式 Lymph node (LN) metastasis and tumor size are closely related to the survival of breast cancer patients. The extent and number of lymph node involvement has long been an important prognostic factor, guiding clinical selection of patients who are more likely to benefit from adjuvant therapy. Regional lymph nodes in breast cancer include axillary (Ax) and intramammary lymph nodes. In the past, extensive radical mastectomy for the removal of intramammary lymph nodes and axillary lymph nodes was the standard surgical procedure for breast cancer.