External-Beam Radiation Therapy Plus Implanted Radiation Therapy in Treating Patients With Prostate Cancer
RATIONALE: Radiation therapy uses high-energy x-rays and other sources to damage tumor cells. Giving radiation therapy in different ways may kill more tumor cells.
PURPOSE: Phase II trial to study the effectiveness of external-beam radiation therapy followed by implanted radiation therapy in treating patients who have prostate cancer.
Radiation: iodine I 125
Radiation: radiation therapy
|Study Design:||Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
|Official Title:||A Phase II Study of External Beam Radiation Therapy Combined With Permanent Source Brachytherapy for Intermediate Risk Clinically Localized Adenocarcinoma of the Prostate|
- Rate of late severe GU and GI toxicity [ Time Frame: Start of radiotherapy to at least 18 months of follow-up ] [ Designated as safety issue: Yes ]Rate of late severe GU and GI toxicity defined as grade 3-5 GU and GI toxicity based on Common Toxicity Criteria 2.0
- Rate of acute severe GU and GI toxicity [ Time Frame: Nine months from the start of radiotherapy ] [ Designated as safety issue: Yes ]Rate of acute severe GU and GI toxicity, defined as grde 3-5 GU and GI toxicity based on Common Toxicity Criteria 2.0
- Biochemical Failure [ Time Frame: From the date of study entry to the date of first occurrence of PSA failure once by ASTRO definition of 3 years of follow-up been completed for all patients ] [ Designated as safety issue: No ]
- Overall failure [ Time Frame: From the date of study entry to the date of death due to any cause ] [ Designated as safety issue: No ]
- Failure rate of clinical progression including local-regional/distant failure [ Time Frame: Documented evidence of local progression or regional nodal recurrence or distant disease relapse ] [ Designated as safety issue: No ]
|Study Start Date:||November 2000|
|Primary Completion Date:||December 2006 (Final data collection date for primary outcome measure)|
Experimental: EBRT to the prostate followed by brachytherapy
Patients received 45 Gy of external beam radiation therapy (EBRT)to the prostate followed (within 2 to 6 weeks) by permanent iodine (I-125) brachytherapy 108 Gy.
|Radiation: brachytherapy Radiation: iodine I 125 Radiation: radiation therapy|
OBJECTIVES: I. Determine the acute and late grade 3-5 genitourinary (GU) and gastrointestinal (GI) toxic effects of external beam radiotherapy followed by permanent source brachytherapy using interstitial iodine I 125 seeds in patients with intermediate risk, clinically localized adenocarcinoma of the prostate. II. Determine the freedom from prostate specific antigen (PSA) failure, overall survival, disease specific survival, and local and/or distant clinical relapse rates in patients treated with this regimen.
OUTLINE: This is a multicenter study. Patients undergo external beam radiotherapy (EBRT) to the pelvis 5 days a week for 5 weeks. Permanent source brachytherapy comprised of ultrasound-guided implantation of iodine I 125 seeds into the prostate is performed 2-6 weeks after completion of EBRT. Patients are followed at 1, 3, 6, 9, and 12 months, then every 6 months for 2 years, and then annually thereafter.
PROJECTED ACCRUAL: A total of 110 patients will be accrued for this study within 1 year.