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High Versus Low Dose Supplemental External Radiation With Pd-103 for Prostate Cancer

Phase 3
40 Years
80 Years
Not Enrolling
Prostate Cancer

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Trial Information

High Versus Low Dose Supplemental External Radiation With Pd-103 for Prostate Cancer

Objective: The objective of this study is test the hypothesis that delivering a higher
percentage of the radiation dose as external radiation versus implant will lead to higher
tumor control rates.

Research design A total of 600 patients with AJC clinical stage T1-T2 prostatic carcinoma
(Gleason grade 7 to 10 and/or PSA 10 to 20 ng/ml) will be randomized to treatment with 44 Gy
versus 20 Gy external radiation plus a Pd-103 implant boost (90 Gy versus 105 Gy,

Methodology: Patients will be randomized by the method of random permuted blocks.

Cancer status will be monitored by serial serum PSA at 6, 12, 18 and 24 months and yearly
thereafter. Treatment-related morbidity will be monitored by personal interview, using
standard American Urologic Association and Radiation Therapy Oncology Group criteria at 1,
3, 6, 12 and 24 months. The primary endpoint will be based on serum PSA. A value above 1.0
ng/ml two years after treatment will be considered to have residual or recurrent cancer and
to have failed therapy.

Findings: 566 patients have been randomized and the study was closed due to slowing
accrual. A preliminary analysis shows similar morbidity between the treatment arms, and
nearly identical cancer control rates between randomization arms.

Inclusion Criteria:

- Males

- Prostate cancer

- PSA 10-20

- Gleason score 7-10

Exclusion Criteria:

- Lymph nodes positive

Type of Study:


Study Design:

Allocation: Randomized, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment

Outcome Measure:

cancer control

Outcome Time Frame:

5-year post treatment

Principal Investigator

Kent E Wallner, MD

Investigator Role:

Study Chair

Investigator Affiliation:

Puget Sound Health Care system


United States: Federal Government

Study ID:




Start Date:

January 1999

Completion Date:

June 2007

Related Keywords:

  • Prostate Cancer
  • prostate
  • brachytherapy
  • Prostatic Neoplasms



VA Puget SoundSeattle, Washington  98108