On October 10, the world's first randomized study on using colonoscopy-screening to prevent colorectal cancer was presented. "Colonoscopy unfortunately is not a miracle cure for colorectal cancer. According to our study, it probably is not better than the fecal samples," says Michael Bretthauer. Previously, experts have assumed that the effect of using colonoscopy to detect colorectal cancer is higher than using fecal samples. Researchers have assumed that up to 9 out of 10 colorectal cancer cases can be prevented using colonoscopy. With fecal samples the same is assumed to be 2–3 out of 10 cases. In the study 1.2% of...