Updated colorectal cancer guidelines endorse new stool tests, recommend limited use of blood tests Medical Xpress Blood testing is now included in screening recommendations for colon and rectal cancer CNN Blood test added to colorectal cancer screening options by cancer group NBC News 3 new low-cost ways to check for colon cancer — that only take 5 minutes Business Insider American Cancer Society reaffirms Cologuard as preferred option By Investing.com Investing.com Canada