Colon cancer is the topic of tonight's Ask the Doctor segment.

Dr. Clark Harrison is with Gastroenterology Consultants.  He's taking your calls between 5-6pm.  To speak with him, dial 858-2222.

For future questions, you can contact his office at

Colon cancer is cancer of the large intestine (colon), the lower part of your digestive system. Rectal cancer is cancer of the last several inches of the colon. Together, they're often referred to as colorectal cancers.

Most cases of colon cancer begin as small, non cancerous (benign) clumps of cells called adenomatous polyps. Over time some of these polyps become colon cancers.

Polyps may be small and produce few, if any, symptoms. For this reason, doctors recommend regular screening tests to help prevent colon cancer by identifying polyps before they become colon cancer.