Aug. 5 (Bloomberg) -- Prostate-cancer screening for men 75 or older may not be necessary because the benefits of early detection don’t outweigh the potential side effects of treatment, a U.S. advisory panel said. ``Insufficient’’ evidence exists to say whether regular screening helps men younger than 75 either, the Preventive Services Task Force said in a statement in the Annals of Internal Medicine. Those men should discuss risks, such as a family history of cancer, and benefits with their doctors, the panel said.