Lymphoma is the correct name of lymphatic cancer. Breast cancer lymphatic metastasis and lymphoma are both malignant tumors, and there are obvious differences between them, which mainly include different pathogenic causes, different clinical manifestations and different treatment options. 1. Different pathogenesis: lymphatic metastasis of breast cancer refers to the transfer of cancer cells originated from breast cancer to surrounding lymphatic tissues along lymphatic vessels; lymphoma is a malignant tumor originated from lymphohematopoietic system. 2. Different clinical manifestations: besides local lymph node enlargement, lymphatic metastasis of breast cancer is mainly characterized by local breast abnormalities, such as breast lumps, cellulite sign and so on, while systemic symptoms are not obvious. Lymphoma mainly manifests as painless lymph node enlargement, hepatosplenomegaly, and all tissues and organs of the body can be involved, accompanied by systemic symptoms such as fever, emaciation and itching. 3. Different treatment plans: breast cancer lymphatic metastasis is mainly treated by surgery, which usually needs to be combined with chemotherapy, radiotherapy, targeted therapy, etc. Lymphoma is often treated with chemotherapy, radiotherapy and targeted therapy. Lymphoma is often treated with the combination of chemotherapy and radiotherapy, and some patients can also choose targeted therapy and myelosuppression. And the drugs chosen for the two diseases are different. If obvious lymph node enlargement is found in the clinic, it is necessary to consult a doctor in time for observation, and then do standardized treatment after determining the pathological type through pathological puncture biopsy.