A new study has found that rates of colon and rectal cancers have declined overall since the 1980s, but researchers also made a puzzling discovery. Colon and rectal cancer rates have actually gone up for people in their 20s and 30s.

In this Mayo Clinic Minute, Dr. David Etzioni, a colon and rectal surgeon at Mayo Clinic, explains details of the study's findings and possible reasons why younger people's colon and rectal cancer rates are going up. Ian Roth reports.

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