What is lymphoma: Malignant lymphoma, also known as “lymphoma”, is a malignant tumor that originates in the lymph nodes or other lymphatic tissues. It is one of the ten most common malignant tumors in China. It can develop in all ages, and there are two peak incidences in adolescence and old age, and the incidence of lymphoma in China is on the rise. The disease can be divided into two major categories, Hodgkin’s lymphoma and non-Hodgkin’s lymphoma, according to its cellular components. There are dozens of detailed subtypes with different degrees of malignancy. What are the causes of lymphoma: The etiology of malignant lymphoma is very complex, and its occurrence is determined by a variety of factors. It is influenced by both environmental factors (i.e. external factors) and the body’s own factors (i.e. internal factors). Environmental factors include physical carcinogenic factors, chemical carcinogenic factors and biological carcinogenic factors. The human body’s own factors refer to the reduction of the body’s anti-tumor ability or various internal factors that are conducive to the role of external carcinogenic factors. Virus and bacteria Among the environmental factors of malignant lymphoma, virus is the most important factor, and it is also the factor that has been studied more and more deeply. In terms of current research, viruses that are closely related to malignant lymphoma include Epstein-barr virus (EBV), human T-cell lymphoma/leukemia virus (HTLV), and human herpes virus type 6 (HHV-6). Helicobacter pylori can cause a high incidence of gastric lymphoma. 2. Radiation Radiation, including ionizing and non-ionizing radiation, is a normal component of the human living environment. Low levels of background come from X-rays, gamma rays, cosmic rays and radionuclides from the earth itself and outer space. For humans, low doses of radiation have no significant carcinogenic effect. High doses of radiation, on the other hand, have a definite carcinogenic effect on the human body. The most reliable basis for the relationship between radiation and human lymphopoietic system tumors comes from the follow-up observation of the surviving population in the atomic bombing areas of Hiroshima and Nagasaki. The incidence of lymphoma is significantly higher in people who are exposed to pesticides, pesticides or harmful chemicals such as paints and rubber than in normal people. 4.Immunity factors The human body’s own factors refer to the reduction of the body’s anti-tumor ability or various intrinsic factors that favor the role of external cancer-causing factors. For example, some autoimmune system diseases, or taking immunosuppressive drugs, etc.