Lymphoma is not called cancer because lymphoma is a tumor of the blood lymphatic system, and only malignant tumors from epithelial cells can be called cancer. Only malignant tumors originated from epithelial cells are called “cancer”, such as lung cancer, liver cancer, stomach cancer, etc. Lymphoma is a tumor originated from lymph nodes and lymphatic tissues, therefore, it is not called “cancer” clinically. Lymphoma can occur in all parts of the body, with painless lymph node enlargement as the main symptom, and it can also invade the gastrointestinal tract, nasopharynx, bones and skin and other extra-nodal organs. It is believed that the disease is related to infection, immunity, genetics and other factors. When diagnosed with lymphoma, you need to actively cooperate with doctors to standardize the treatment, and the treatment methods include radiotherapy, chemotherapy, drug therapy and so on. Lymphoma patients need to go to the hospital for regular follow-ups, and should inform the doctor in time if there is any other discomfort in the body, so as to avoid any adverse effects.