乳腺癌(breast cancer)是严重威胁女性健康的主要恶性肿瘤,占女性恶性肿瘤死亡率的第2位[1]。乳腺癌常早期发生淋巴结转移,淋巴结转移的有无及淋巴结受累的程度是决定乳腺癌分期和临床治疗方案选择的关键,也是临床评估乳腺癌患者病情及预后的重要指标。因此,研究乳腺癌淋巴结转 Breast cancer is a major malignant tumor that seriously threatens the health of women, accounting for the second highest death rate of malignant tumors in women [1]. The incidence of lymph node metastasis, lymph node metastasis and lymph node involvement in breast cancer are the key factors in the selection of breast cancer staging and clinical treatment options. It is also an important index for clinical evaluation of disease and prognosis in patients with breast cancer. Therefore, the study of breast cancer lymph node transfer