The five-year survival rate for diffuse large b lymphoma is about 70% in early stages and about 30% in advanced or high-risk patients, depending on the severity of the disease and the patient’s physical condition. Diffuse large b lymphoma is the more common type of non-Hodgkin’s lymphoma and accounts for about 40% of all B-cell lymphomas. If the disease is in the early stages, the 5-year survival rate is about 70%. However, if the disease is advanced or high-risk, the 5-year survival rate is about 30%. Life expectancy may be shortened if the patient has underlying medical conditions, such as high blood pressure, cardiovascular or cerebrovascular disease, or if he or she is older. Patients diagnosed with diffuse large b lymphoma need to be treated in time, and the earlier the treatment, the earlier the spread and metastasis of the cancer cells can be controlled, which can prolong the life span.