On-and-off Approach To Prostate Cancer Treatment May Compromise Survival
Large, international trial finds intermittent androgen deprivation is not equivalent to continuous treatment
ANN ARBOR, Mich., April 4, 2013 /PRNewswire-USNewswire/ -- Taking a break from hormone-blocking prostate cancer treatments once the cancer seems to be stabilized is not equivalent to continuing therapy, a new large-scale international study finds.
Based on previous smaller studies, it looked like an approach called intermittent androgen deprivation therapy might be just as good as continuous androgen deprivation in terms of survival while meanwhile giving patients a breather from the side effects of therapy. In fact, researchers believed intermittent therapy might help overcome treatment resistance that occurs in most patients with metastatic hormone-sensitive prostate cancer.
But this new study, which treated 1,535 patients with metastatic prostate cancer and followed them for a median of 10 years, finds that's not the case. Results appear in the New England Journal of Medicine."We tried to see whether intermittent androgen deprivation is as good as continuous androgen deprivation, but we did not prove that. We found that intermittent therapy is certainly not better and moreover we cannot even call it comparable," says lead study author Maha Hussain, M.D., FACP, a prostate cancer expert at the University of Michigan Comprehensive Cancer Center. The study was sponsored by SWOG, a National Cancer Institute-supported cancer clinical trials cooperative group. In the study, men with metastatic hormone-sensitive prostate cancer were given an initial course of androgen deprivation therapy (hormone therapy), which is standard therapy for this disease. Patients with a stable or declining PSA level equal to or below a cut-off of 4 ng/ml were then randomly assigned either to continue or to discontinue the hormone therapy. Patients were carefully monitored with monthly PSAs and a doctor's evaluation every three months and therapy was resumed in the intermittent arm when PSA climbed to 20 ng/ml. The intermittent cycle continued on-and-off based on the PSA levels.
Select the service that is right for you!COMPARE ALL SERVICES
- $2.5+ million portfolio
- Large-cap and dividend focus
- Intraday trade alerts from Cramer
- Weekly roundups
Access the tool that DOMINATES the Russell 2000 and the S&P 500.
- Buy, hold, or sell recommendations for over 4,300 stocks
- Unlimited research reports on your favorite stocks
- A custom stock screener
- Upgrade/downgrade alerts
- Diversified model portfolio of dividend stocks
- Alerts when market news affect the portfolio
- Bi-weekly updates with exact steps to take - BUY, HOLD, SELL
- Real Money + Doug Kass Plus 15 more Wall Street Pros
- Intraday commentary & news
- Ultra-actionable trading ideas
- 100+ monthly options trading ideas
- Actionable options commentary & news
- Real-time trading community
- Options TV