It may be Colorectal Cancer Awareness Month, but that doesn't mean everyone should run out and get a colonoscopy. The U.S. Preventive Services Task Force recommends against screening for colorectal cancer for people older than 75. (People 76-85 may consider it on an individual basis.) That's because colon cancer is slow growing, more than 10 years in many cases, but the risks of a colonoscopy -- internal tears, bleeding and hospitalization -- become a greater concern as a patient ages.