Why Is Colon Cancer Becoming More Common in Young Adults?

James Van Der Beek is in the prime of his life, yet he's one of the 150,000 Americans diagnosed with colon cancer this year. Colorectal cancer is now the leading cause of cancer death for adults under 50. The "Dawson's Creek" actor went public with his private cancer battle, telling People Magazine, "I have colorectal cancer… and have been taking steps to resolve it, with the support of my incredible family.”