It is generally accepted that the etiology of lymphoma is not fully understood, and the medical community currently attaches great importance to the viral theory. For example, EBV, retrovirus human T-lymphotropic virus type I and II, Kaposi sarcoma virus, etc. In addition to viruses that may cause lymphoma, antigens of Helicobacter pylori that cause peptic ulcers may also cause lymphoma. The development of lymphoma may also be associated with immunocompromised function.