The accuracy of detecting bowel cancer is increased to almost 100% by carrying out a common test twice rather than once, a new study shows. The test—called a fecal immunochemical test (FIT)—is used to detect blood in bowel movements that is not visible, which may indicate the presence of bowel cancer. Researchers found that carrying out the test twice ensured more cases of bowel cancer were identified. As well as reducing the risk of a missed diagnosis, experts say this two-test approach has the potential to reduce demand for colonoscopies in a health care system under pressure. Early detection is...