Stereotactic Boost and Long-Term Androgen Deprivation for Adenocarcinoma of the Prostate

The primary objective of this study is to assess the feasibility and safety of a treatment strategy incorporating whole pelvic IMRT followed by an SBRT boost to the prostate with neoadjuvant, concurrent, and adjuvant androgen deprivation for a total of 28 months for men with unfavorable intermediate or high risk localized prostate cancer. The secondary objective is to assess biochemical control at 24 months following the experimental treatment strategy by the "Phoenix definition". Patients not meeting these prostate-specific antigen (PSA) criteria (Phoenix Definition) for failure who undergo salvage therapies (such as androgen deprivation therapy (ADT), radical prostatectomy or brachytherapy, or Cryosurgery) should also be declared as failures at the time a positive biopsy is obtained or salvage therapy is administered, whichever comes first. Another secondary objective is to assess toxicity of the experimental treatment approach as scored by the Common Terminology Criteria for Adverse Events The third secondary objective is to assess prostate organ motion during hypofractionated radiotherapy. To assess motion of the prostate during the protracted delivery of hypofractionated radiotherapy as assessed by implanted electromagnetic transponder beacons.