Colorectal cancer screening should start at age 45, not 50, American Cancer Society says

May 2018 -- The American Cancer Society, responding to a rise in colorectal cancer rates among younger people, is now recommending that adults undergo screening for the disease beginning at age 45 rather than 50.

The organization, which announced the change in its guidelines Wednesday, said extensive analysis showed that lowering the starting age for screening would save lives. The recommendations apply to adults who are at average risk of the disease; this includes most people in the United States.

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