CyberKnife Radiosurgery for Locally Recurrent Prostate CA

Inclusion Criteria: * Histologically confirmed recurrent adenocarcinoma of the prostate, clinical stage T1 - T3 (AJCC 6th Edition, see Appendix II), NX/N0, M0, following prior prostate radiotherapy. * Karnofsky performance status \>80. * Greater than 5 year life expectancy * Greater than 2 years since the original course of radiotherapy. * Absence of distant metastases by radiologic or pathologic assessment. * Absence of lymph node involvement by radiologic or pathologic assessment. * Patients must sign a study-specific informed consent form prior to study entry. Exclusion Criteria: * Stage T4 disease (AJCC 6th Edition, see Appendix II). * Less than 2 years since the original course of radiotherapy. * Lymph node involvement (N1). * Evidence of distant metastases (M1). * Radical surgery for carcinoma of the prostate * Previous or concurrent cancers other than basal, in situ, or squamous cell skin cancers unless disease-free for ≥ 5 years. * Major medical or psychiatric illness, which in the investigator's opinion, would prevent completion of treatment and would interfere with follow-up. * History of inflammatory bowel disease * Late GI or GU Morbidity \> Grade 1 from the prior course of radiotherapy