A new study shows that rates of colon and rectal cancers have climbed in younger adults over the last decade.
Those cancer cases jumped nearly 4 percent each year from 1998 to 2007. For people over age 50, rates of colorectal cancer have dropped steadily in recent years.
Fifty is the age when most people are advised to begin screening for the disease.
Researchers aren't sure what's causing the increase in younger adults. But they hope this study will encourage younger people to see a doctor and not ignore symptoms for months.