Feasibility and Safety Study Using Preoperative High-Dose Single-Fraction Image-Guided Radiotherapy for Men Undergoing Radical Prostatectomy at High-Risk for Extraprostatic Cancer

This study is being done to test the safety of a single high-dose of radiation therapy
before radical prostatectomy (removal of the prostate). The investigators want to find out
what effects, good and/or bad, the radiation will have on men undergoing prostatectomy. The
investigators are especially interested in men who are at risk for having cancer cells that
have spread outside the prostate.