The difference between lymphoma and lymph nodes is mainly manifested in the following two points: firstly, lymph nodes are normal human anatomical structures and are relay stations of lymphatic fluid return; lymphoma is usually lymphatic metastasis cancer with primary malignant tumors in other parts of the body or tissues and organs, such as lymph node metastasis cancer around the intestinal mesentery arising from primary gastric cancer or intestinal cancer, or lymph node metastasis cancer in the axilla arising from breast cancer. Secondly, from the perspective of disease treatment, normal lymph nodes are the relay station of lymphatic fluid return and do not need treatment; lymphatic metastases usually require further CT examination, and if the primary tumor can be radically resected, radical resection of the primary tumor plus clearance of surrounding lymph node metastases is usually required, which usually requires postoperative chemotherapy, or even radiotherapy or immunotherapy, molecular targeted drug therapy, etc. The treatment is usually combined with post-operative chemotherapy or even radiotherapy or immunotherapy or molecular target drugs.