A Study of Reduced Dose Radiation Therapy for People With B-Cell Lymphomas

This study is testing whether lower doses of radiation therapy (compared to standard doses) are just as effective for people with slow-growing B-cell lymphomas (such as follicular lymphoma or marginal zone lymphoma). **You may be eligible if:** - You have been diagnosed with follicular lymphoma or marginal zone lymphoma (including subtypes recognized under current classification systems) - You have a measurable area of lymphoma that can be treated with radiation - You have previously received some form of treatment, or this is being considered as palliative (symptom-relieving) treatment **You may NOT be eligible if:** - You have an aggressive (fast-growing) type of lymphoma - You are pregnant - You have had prior radiation to the area being treated that has reached the maximum safe dose - You have active autoimmune disease requiring treatment with immune-suppressing medications Talk to your doctor to see if this trial is right for you.