A study reveals that more complications occur in patients treated with radiation therapy versus surgery for prostate cancer. Researchers from the University of Toronto analyzed over 60,000 men between the ages of 65 and 79 who has either underwent a radical prostatectomy or radiation. Results suggest that prostate cancer patients who undergo radiation therapy have a 25-40% increased risk of requiring minimally invasive urologic procedures due to treatment complications. Via PR Newswire. Posted July 7, 2015.