for males ages 18 years and up (full criteria)
study started
estimated completion
Principal Investigator
by Amar Kishan, MD (ucla)



This phase II trial studies how well stereotactic body radiation therapy works in treating patients with prostate cancer that has not spread to other parts of the body and have undergone surgery. Stereotactic body radiation therapy is a specialized radiation therapy that sends x-rays directly to the tumor using smaller doses over several days and may cause less damage to normal tissue.

Official Title

Prospective Study of Stereotactic Body Radiotherapy (SBRT) Following Radical Prostatectomy


PRIMARY OBJECTIVES: I. To determine the efficacy of postoperative stereotactic body radiation therapy (SBRT) at a dose of 34 grays (Gy) in five fractions, as compared with historical control efficacy rates in patients who received conventionally fractionated postoperative radiotherapy. II. To determine the toxicity of postoperative SBRT at a dose of 34 Gy in five fractions, both via physician-scored and patient-reported metrics. SECONDARY OBJECTIVES: I. To determine the proportion of SBRT fractions for which on-line adaptive radiotherapy is required due to changes in organ-at-risk anatomy, in the subset of patients treated with magnetic resonance imaging (MRI)-guided radiotherapy. II. To gather biomarkers that may elucidate predictors of increased efficacy or increased toxicity. TERTIARY OBJECTIVES: I. To compare toxicity profiles (both physician-scored and patient-reported) between patients treated utilizing a linear accelerator versus a tri-60Co teletherapy platform. OUTLINE: Patients undergo SBRT every other day (QOD) for 14 days. Patients may also receive androgen deprivation therapy (ADT) comprised of a luteinizing hormone-releasing hormone agonist or a gonadotropin-releasing hormone antagonist, and an oral anti-androgen for 6 months at the discretion of the treating physician. After completion of study treatment, patients are followed up at 1 month, every 3 months for 1 year, every 6 months for 4 years, and then annually thereafter.


PSA Level Greater Than 0.03 PSA Progression Stage I Prostate Adenocarcinoma AJCC (American Joint Committee on Cancer ) v7 Stage II Prostate Adenocarcinoma AJCC v7 Stage III Prostate Adenocarcinoma AJCC v7 Adenocarcinoma Prostatic Neoplasms Ascorbic Acid Methyltestosterone Hormones Estrogens, Conjugated (USP) Androgens Androgen Antagonists Antiandrogen Therapy Quality-of-Life Assessment Stereotactic Body Radiation Therapy


You can join if…

Open to males ages 18 years and up

  • History of histologically confirmed, clinical localized adenocarcinoma of the prostate treated with radical prostatectomy with definitive intent
  • Presence of adverse pathologic features at the time of prostatectomy (positive surgical margin, pathologic T-stage 3-4 disease, pathologic Gleason score 8-10 disease, presence of tertiary Gleason grade 5 disease) OR documentation of rising prostate-specific antigen on at least two consecutive draws, with the magnitude of prostate-specific antigen exceeding 0.03 ng/mL
  • Computed tomography (CT) scan and MRI of the pelvis within 120 days prior to enrollment (note: [a] if patient has medical contraindication to MRI, an exemption will be granted and enrollment can proceed [b] for patients with PSA < 1.0 ng/mL, the treatment planning CT can substitute for a diagnostic CT scan)
  • Bone scan within 120 days prior to enrollment; if the bone scan is suspicious, a plain x-ray and/or MRI must be obtained to rule out metastasis, and advanced imaging (e.g., 18NaF positron emission tomography [PET]/CT) is strongly recommended
  • Karnofsky performance score (KPS) >= 70
  • Ability to understand, and willingness to sign, the written informed consent

You CAN'T join if...

  • Patients with any evidence of distant metastases
  • Patients with pathologically-confirmed N1 prostate cancer
  • Patients with neuroendocrine or small cell carcinoma of the prostate
  • Prior cryosurgery, high-intensity focused ultrasound ablation (HIFU) or brachytherapy of the prostate
  • Prior pelvic radiotherapy
  • History of Crohn's disease, ulcerative colitis, or ataxia telangiectasia


  • UCLA / Jonsson Comprehensive Cancer Center accepting new patients
    Los Angeles California 90095 United States
  • USC Norris Comprehensive Cancer Center and Hospital accepting new patients
    Los Angeles California 90033 United States

Lead Scientist at UC Cancer

  • Amar Kishan, MD (ucla)
    Associate Professor-in-Residence, Radiation Oncology. Authored (or co-authored) 153 research publications.


accepting new patients
Start Date
Completion Date
Jonsson Comprehensive Cancer Center
Phase 2
Study Type
Last Updated