Study sees prostate cancer treatment side effects Associated Press Copyright 2013 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Updated 4:02 pm, Wednesday, January 30, 2013 Study sees prostate cancer treatment side effects A new study shows how important it is for men to carefully consider treatments for early-stage prostate cancer. The study isn't a rigorous test of surgery and radiation, but it is the longest follow-up of some men who chose those treatments. Since early prostate cancers usually don't prove fatal but there are no good ways to tell which ones really need treatment, men must be realistic about side effects they might suffer, said one study leader, Dr.