What is the rate of survival of a diffuse b-cell lymphoma?

It is quite good: These are fast growing lymphomas that respond well to modern chemotherapy. Your doctor can tell you what risk category you fall into based on your age and several aspects of your tumor which include it's stage at presentation. Outside of this, staying on time with chemotherapy and not having to reduce the intended dose lead to the highest cure rates. The majority of patients can be cured.

No simple answer: But most studies say that with early detection and effective treatment 50-60% are curable. See your doctor.

See below...: The prognosis depends heavily on the international prognostic index (ipi). Treatment with Rituximab in the modern era significantly improved the prognosis. The overall 5 year survival rate in the absence of high risk factors is probably around 60-70%.