It is possible for breast cancer patients to get lymph node cysts. Early stage of breast cancer often manifests symptoms such as breast lump, nipple overflow and enlarged axillary lymph nodes, among which enlarged axillary lymph nodes are caused by the invasion of surrounding lymphatic vessels when breast cancer cells are shedding off and metastasizing to its local lymphatic drainage area, while enlarged axillary lymph nodes can cause lymph node cysts, so it is possible that patients with breast cancer will get lymph node cysts. Breast cancer is a phenomenon of uncontrolled proliferation of breast epithelial cells under the action of various carcinogenic factors. Lymph node cysts are cystic swellings generated by abnormal expansion of lymphatic vessels caused by hyperplasia during the development of primitive lymphatic vessels. It is suggested that when breast cancer patients are diagnosed, they should carry out treatment under the guidance of doctors in time and actively cooperate with doctors, so as to avoid delaying treatment and causing systemic multi-organ lesions.