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乳腺癌是妇女最常见的恶性肿瘤（３１％），其死亡率仅次于肺癌而位居第二［１］，且其发病率仍有逐渐升高趋势。恶性肿瘤细胞的转移是主要致死因素，而淋巴结转移和原发肿瘤大小是目前判断预后和制定治疗方案的主要参考指标。然而，仍有约２４％经常规检查没有发现任何转移
Breast cancer is the most common malignant tumor in women (31%). Its mortality is second only to lung cancer and ranks second [1], and its incidence rate is still gradually increasing. The metastasis of malignant tumor cells is the main cause of death. Lymph node metastasis and the size of primary tumors are currently the main reference indicators for judging the prognosis and establishing treatment plans. However, about 24% still did not find any transfer after routine inspection