Standard Radiation Therapy With or Without Stereotactic Radiation Therapy in Treating Patients With Glioma

RATIONALE: Radiation therapy uses high-energy x-rays to damage tumor cells and may be an effective treatment for patients with glioma. Stereotactic radiation therapy may be able to deliver x-rays directly to the tumor and cause less damage to normal tissue. It is not yet known if standard radiation therapy is more effective when followed by stereotactic radiation therapy. PURPOSE: Randomized phase III trial to compare the effectiveness of standard radiation therapy with or without stereotactic radiation therapy in treating patients who have glioma.