PHILADELPHIA (EGMN) - A newly available, noninvasive screening test for colorectal cancer based on detecting a cancer-specific form of DNA had a sensitivity and specificity of greater than 80% in studies with a total of 363 people.The indication for this screening test, known as ColoSure, is "people who refuse to have a colonoscopy," Dr. Sanford Markowitz said at a conference sponsored by the American Association for Cancer Research. "If we use this test, it has the potential to substantially lower...