Colon cancer found in more younger adults. 'Get screened,' doctor saysYounger adults may have the highest risk of presenting with distant-stage colorectal cancer, according to researchers. A distant-stage cancer is one that has spread beyond adjacent organs or tissues.

Colorectal cancer, sometimes called colon cancer, occurs when cells in the colon or rectum grow out of control.

In a study published this week in a journal by the American Association for Cancer Research, the authors analyzed annual incidence data in the U.S. SEER 18 cancer registry from the years 2000-2016, including 103,975 patients with colorectal adenocarcinoma.

Adenocarcinoma is a type of cancer that may occur almost anywhere in the body, starting in glands that line the insides of the organs, according to the Cancer Treatment Centers of America.

They divvied up the data by disease stage, subsite, patient age and race before calculating the change in incidence rate and change in distant-stage proportions – or the percentage of distant-stage disease out of all cancer stages combined – between 2000 and 2016 for various age groups.

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