Cells in the colon, or large intestine’s lining constantly renew themselves, but the genes that regulate this process sometime go awry, leading to the growth of new cells disproportionately. This causes abnormal clumps of cells called polyps to grow and develop into a cancerous one. So are you at risk for colon cancer? How can you be screened? What are some of the best ways to prevent colon cancer? Find out in the video above.