By Charlene Laino (WebMD) -- Jan. 24, 2008 (Orlando) -- A novel blood test holds promise for both detecting and preventing colon cancer, researchers report. The test spots a protein called colon cancer-specific antigen-2 (CCSA-2) that is elevated in the presence of colon cancer or growths that are destined to become colon cancer. In contrast, the protein appears to be rare in low-risk colon polyps and healthy tissue.
