October 14, 2015 8:20 am Using Urine to Detect Brain Tumors A urine sample can reveal pregnancy, an infection or unmask drug use. But could it also tell you about brain tumors? US & World Videos 4:41 Parents sue over AI chatbot they say encourages children to harm themselves and others 1:51 Strong gas odor wafting from Chelsea to Winthrop 8:10 Heavy rain and strong winds impact travel 1:55 Scammers targeting shoppers with coupon scams this holiday season 2:32 Concession workers at Boston's TD Garden to vote on whether to strike