Lymphoma refers to a type of malignant tumor that originates in the lymph nodes or extranodal tissues or organs. It is clinically categorized into two main types: Hodgkin's lymphoma and non-Hodgkin's lymphoma. Furthermore, it can be subdivided into many different pathological types. Among these, diffuse large B-cell lymphoma is the most common type in China, and there are dozens of different pathological types. The pathological type of the lymphoma determines its malignancy level, prognosis, chemotherapy regimen options, and treatment methods, all of which can vary significantly.