Prior patient studies have shown that short-term hormone therapy (about 4 months) before and during radiation therapy can benefit patients with bulky tumors or locally-advanced prostate tumors. These prior results have been used to justify a potential benefit for using short-term hormone therapy combined with radiation therapy for patients with less bulky or less advanced prostate cancers. However, the combination of hormone therapy and radiation has not been shown to definitively benefit patients with your level of prostate cancer. Furthermore, these older studies used relatively low doses of radiation by today's standards, and hormone therapy may be of no benefit when using higher doses of radiation. Researchers want to study the use of combination hormone therapy and radiation therapy in the treatment of your level of prostate cancer.