Neoadjuvant Stereotactic Body Radiotherapy Prior to Radical Prostatectomy for High Risk Prostate Cancer

Inclusion Criteria: * Subjects must have biopsy-confirmed adenocarcinoma of the prostate. * Subjects must have a negative bone scan. * Subjects must have one of the following risk factors: * PSA ≥20 and/or * Gleason score ≥8 and/or * Clinical or radiographic stage ≥T3a per AJCC (American Joint Committee on Cancer) 7th Edition Staging Manual and/or * Radiographic pelvic lymph node positive disease and/or * At least two out of four of the following: PSA (Prostate Specific Antigen) 10-19.9, GS (Gleason Score) = 3+4, clinical stage = T2b/T2c, ≥50% positive biopsy cores. * Subjects must freely sign informed consent to enroll in the study. * Subjects must be medically fit to undergo surgery determined by the PI. * Age ≥ 18 * KPS Karnofsky Performance Status (performance status is an attempt to quantify cancer patients' general well-being and activities of daily life, scores range from 0 to 100 where 100 represents perfect health and 0 represents death): ≥70. * No prior invasive malignancy in the past 3-years, except non-melanomatous skin cancer unless disease free for a minimum of 2 years. Carcinoma in-situ of the bladder or head and neck region is permissible. * Subjects must not have had prior pelvic radiation therapy, * Subjects must not have had prior androgen deprivation therapy in the past 6 months. Exclusion Criteria: * Metastatic disease as demonstrated by bone scan, CT scan or MRI (Magnetic Resonance Imaging) of the pelvis, or chest x-ray. * Declared high-risk for anesthesia by attending anesthesiologist, cardiologist, or other physician. * History of prior pelvic radiation therapy. * History of androgen deprivation therapy within the past 6 months.