By Jacqueline Howard, CNN

(CNN) — Even more colorectal cancer cases are being found in adults under 50, and a new collection of research suggests that a surge in screening may be tied to many of the more recent diagnoses – but not the overall trend.

In 2018, the American Cancer Society updated its guidelines for colon and rectal cancer screening, recommending that adults at average risk get screened starting at age 45 – earlier than 50, which was previously advised.

Then, in 2021, the US Preventive Services Task force also lowered the recommended age to start screening for colon and rectal cancers from 50 to 45.

The shift in screening guidelines is associated with a recent increase in early-stage colorectal cancer diagnoses, but it does not explain the rise among younger adults in

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