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CyberKnife Radiosurgery For Low & Intermediate Risk Prostate Cancer: Emulating HDR Brachytherapy Dosimetry

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00643617
Recruitment Status : Active, not recruiting
First Posted : March 26, 2008
Last Update Posted : March 4, 2021
Information provided by (Responsible Party):
Accuray Incorporated

Brief Summary:
The purpose of this study is to investigate the effects of CyberKnife radiosurgery in patients with early stage organ-confined prostate cancer and to evaluate the effects of this treatment on the quality of life over time.

Condition or disease Intervention/treatment Phase
Prostate Cancer Prostatic Cancer Prostatic Neoplasms Prostate Neoplasms Cancer of the Prostate Radiation: CyberKnife Stereotactic Radiosurgery Not Applicable

Detailed Description:

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.

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 253 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Prospective Evaluation of CyberKnife Stereotactic Radiosurgery for Low and Intermediate Risk Prostate Cancer: Emulating HDR Brachytherapy Dosimetry
Actual Study Start Date : November 2007
Estimated Primary Completion Date : June 2022
Estimated Study Completion Date : June 2022

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Prostate Cancer

Arm Intervention/treatment
Heterogeneous dose
38 Gy delivered in 4 fractions of 9.5 Gy per fraction with CyberKnife Stereotactic Radiosurgery
Radiation: CyberKnife Stereotactic Radiosurgery
38 Gy delivered in 4 fractions of 9.5 Gy per fraction
Other Name: CyberKnife

Primary Outcome Measures :
  1. 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. [ Time Frame: 10 years ]
  2. To compare the CyberKnife biochemical disease free survival rates (bDFS) to published HDR monotherapy bDFS rates reported in the literature. [ Time Frame: 10 years ]

Secondary Outcome Measures :
  1. To measure the rates of local failure, distant failure, clinical-disease free survival, disease-specific survival, overall survival and quality of life. [ Time Frame: 10 years ]

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   No

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

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00643617

Show Show 18 study locations
Sponsors and Collaborators
Accuray Incorporated
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Study Chair: Donald B Fuller, MD CyberKnife Centers at San Diego, CA
Study Chair: George Mardirossian, PhD CyberKnife Centers of San Diego, CA
Additional Information:
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Responsible Party: Accuray Incorporated Identifier: NCT00643617    
Other Study ID Numbers: ACCP002.2
First Posted: March 26, 2008    Key Record Dates
Last Update Posted: March 4, 2021
Last Verified: January 2021
Keywords provided by Accuray Incorporated:
Prostate Cancer
Stereotactic Radiosurgery
Prostate Tumor
Prostate Surgery
Additional relevant MeSH terms:
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Prostatic Neoplasms
Genital Neoplasms, Male
Urogenital Neoplasms
Neoplasms by Site
Prostatic Diseases