28
May
Related media - Associated media The biggest problem with blood tests is that, unlike colonoscopies, they don’t detect most precancerous growths on the colon that, if detected and removed, would prevent a person from developing cancer. This, said Dr. Stephen M. Hewitt, a member of the National Cancer Institute board, “really undermines the concept of cancer prevention.” The test, said Charity J. Morgan, a committee member and professor of biostatistics at the University of Alabama at Birmingham, “is better than nothing for patients who get nothing, but it’s no better than a colonoscopy.” And there are many people who get…