Lymphatic tract metastasis of breast cancer usually occurs in the ipsilateral axillary lymph nodes at the earliest, for example, the most common metastatic site of left breast cancer or right breast cancer is the left axillary lymph node or the right axillary lymph node, and other supraclavicular lymph nodes and mediastinal lymph nodes also have metastasis. Once the breast cancer has metastasized to the axillary lymph nodes, there is still a chance for radical surgery. Radical mastectomy or modified radical mastectomy is a surgery that includes the whole mastectomy plus axillary lymph node dissection, and after the surgery, it can be combined with comprehensive treatment such as radiotherapy, chemotherapy, endocrine therapy and targeted drugs. Breast cancer is also a systemic disease that requires comprehensive treatment. If supraclavicular lymph node metastasis occurs in breast cancer, it is recommended to do neoadjuvant chemotherapy before surgery, if the metastatic lesion can be shrunk, then surgery will be more effective.