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RATIONALE: Testosterone can stimulate the growth of prostate cancer cells. Hormone therapy may be effective treatment for prostate cancer. It is not yet known which regimen of hormone therapy is most effective for stage IV prostate cancer.
PURPOSE: This randomized phase III trial is studying two different regimens of hormone therapy and comparing how well they work in treating men with stage IV prostate cancer.
- Compare the survival of patients with metastatic stage IV prostate cancer responsive to combined androgen-deprivation therapy (CAD) treated with intermittent vs continuous CAD.
- Compare the effects of these treatment regimens on impotence, libido, and vitality/fatigue as well as the physical and emotional well-being of these patients.
- Compare general symptoms, role functioning, global perception of quality of life, and social functioning of patients treated with these regimens.
- Assess prostate-specific antigen (PSA) levels after continuous CAD administered before randomization and evaluate PSA changes throughout randomized treatment of these patients.
OUTLINE: This is a randomized, multicenter study. Patients are stratified according to SWOG performance status (0-1 vs 2), severity of disease (minimal vs extensive), and prior hormonal therapy (neoadjuvant hormonal therapy vs finasteride vs neither).
- Induction therapy: Patients receive combined androgen-deprivation (CAD) therapy comprising goserelin subcutaneously once a month and oral bicalutamide once daily for 8 courses (7 months).
- Consolidation therapy: Patients are randomized to 1 of 2 consolidation regimens.
- Arm I (continuous CAD therapy): Patients continue CAD therapy as in induction therapy. Treatment continues in the absence of disease progression.
- Arm II (intermittent CAD therapy): Patients undergo observation in the absence of rising prostate-specific antigen (PSA) or clinical symptoms of progressive disease. Patients with rising PSA or progressive disease begin CAD therapy as in induction therapy. Patients whose PSA normalizes after 8 courses return to observation. Patients whose PSA does not normalize after 8 courses continue CAD therapy.
Quality of life is assessed before induction therapy, at 3 months (before consolidation therapy), and then at 9 and 15 months.
Patients are followed every 6 months.
PROJECTED ACCRUAL: Approximately 1,500 patients will be accrued for this study.
Allocation: Randomized, Control: Active Control, Primary Purpose: Treatment
bicalutamide, goserelin, clinical observation
Tom Baker Cancer Centre - Calgary
National Cancer Institute (NCI)
Published on BioPortfolio: 2014-08-27T03:59:01-0400
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