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Prospective Evaluation of CyberKnife Stereotactic Radiosurgery for Low and Intermediate Risk Prostate Cancer: Emulating HDR Brachytherapy Dosimetry

Phase 2
18 Years
Open (Enrolling)
Prostate Cancer, Prostatic Cancer, Prostatic Neoplasms, Prostate Neoplasms, Cancer of the Prostate

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Trial Information

Prospective Evaluation of CyberKnife Stereotactic Radiosurgery for Low and Intermediate Risk Prostate Cancer: Emulating HDR Brachytherapy Dosimetry

In this study, CyberKnife radiosurgery will be used to produce dose distributions comparable
to those created by HDR brachytherapy treatment, without the use of invasive catheters. The
radiosurgery volumes will closely be made to resemble HDR brachytherapy therapeutic volumes
with similar dose limitation objectives to adjacent normal tissues.

The CyberKnife Robotic Radiosurgery System is a unique radiosurgical system capable of
treating tumors anywhere in the body noninvasively and with sub-millimeter accuracy. The
CyberKnife System delivers radiation using a precise targeting methodology allowing a focal
treatment margin around the target, thus limiting the volume of adjacent tissue receiving
high doses radiation. This in turn allows the delivery of high doses of radiation to the
prostate over a short series of treatments.

Inclusion Criteria:

- Patient must be at least 18 years of age

- Histologically proven prostate adenocarcinoma

- Biopsy within 1 year of date of registration

- Clinical Stage T1b-T2b, N0, M0

- Patients belonging to one of the following risk categories:

- Low Risk: CS T1b-T2a, Gleason Score 2-6, PSA < or = 10 ng/ml

- Intermediate Risk: CS T2b, Gleason Score 2-6, PSA < or = 10 ng/ml or CS T1b-T2b,
Gleason Score 2-6, PSA < or = 20 ng/ml or CS T1b-T2b, Gleason Score 7 and PSA < or =
10 ng/ml

- ECOG performance status 0-1

Exclusion Criteria:

- Clinical Stage T2c or greater

- Prior prostatectomy or cryotherapy of the prostate

- Prior radiotherapy fo the prostate or lower pelvis

- Implanted hardware or other material that would prohibit appropriate treatment
planning or delivery

- History of an invasive malignancy other than basal or squamous skin cancers in the
last 5 years

- Hormone ablation for two months prior to enrollment or during treatment

Type of Study:


Study Design:

Endpoint Classification: Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment

Outcome Measure:

To determine biochemical disease free survival (using both ASTRO and Phoenix definitions) and measure the rates of acute and late genitourinary and gastrointestinal toxicities following CyberKnife radiosurgery.

Outcome Time Frame:

10 years

Safety Issue:


Principal Investigator

Donald B Fuller, MD

Investigator Role:

Study Chair

Investigator Affiliation:

CyberKnife Centers at San Diego, CA


United States: Institutional Review Board

Study ID:




Start Date:

November 2007

Completion Date:

January 2019

Related Keywords:

  • Prostate Cancer
  • Prostatic Cancer
  • Prostatic Neoplasms
  • Prostate Neoplasms
  • Cancer of the Prostate
  • Prostate Cancer
  • CyberKnife
  • Stereotactic Radiosurgery
  • Radiosurgery
  • Prostate Tumor
  • Prostate Surgery
  • Neoplasms
  • Prostatic Neoplasms



St. Anthony Hospital Oklahoma City, Oklahoma  73101
Long Beach Memorial Medical Center Long Beach, California  90806
Comprehensive Cancer Centers of Nevada Las Vegas, Nevada  89109
Penrose Cancer Center Colorado Springs, Colorado  80933
AtlantiCare Regional Medical Center Pomona, New Jersey  08240
University of North Carolina Chapel Hill, North Carolina  27599
Elmhurst Memorial Hospital Elmhurst, Illinois  60126
Sarah Cannon Research Institute Nashville, Tennessee  37203
East Texas Medical Center Tyler, Texas  75701
Community Regional Medical Center Fresno, California  93721
Mitchell Cancer Center University of South Alabama Mobile, Alabama  36604
Pasadena Cyberknife Center Pasadena, California  91105
CyberKnife Centers of San Diego San Diego, California  92101
Colorado Cyberknife Lafayette, Colorado  80026
New Millenium CyberKnife Brandon, Florida  33511
JFK Comprehensive Cancer Center Lake Worth, Florida  33461
South Florida Radiation Oncology Wellington, Florida  33449
Benefis Health System - Sletten Cancer Institute Great Falls, Montana  59405