OUTLINE: Patients undergo fludeoxyglucose F18 positron emission tomography (FDG-PET) and CT scan at baseline. Patients then undergo radiofrequency ablation (RFA). Beginning within 5 weeks after completion of RFA, patients undergo external-beam radiation therapy once daily, 5 days a week, for 5-6 weeks. FDG-PET/CT scan is repeated 3-4 weeks after RFA and 12-16 weeks after completion of external-beam radiation therapy.