Colorectal cancer is rising sharply among younger Americans, with new research showing cases among children aged 10 to 14 increased sixfold between 1999 and 2020.
Cases more than quadrupled among teenagers aged 15 to 19 and nearly doubled among young adults aged 20 to 24.
Experts are investigating possible causes, including ultra-processed foods, obesity, physical inactivity, antibiotic use and environmental exposures such as microplastics. Changes in the gut microbiome and chronic inflammation may also contribute, although the causes remain uncertain.
Colorectal cancer remains rare in children. However, specialists emphasize recognizing warning signs, particularly rectal bleeding, which is strongly associated with colorectal cancer in younger adults and warrants medical evaluation.
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Colorectal cancer is surging in an unexpected group - and it's 'developing differently' https://t.co/2SF0Ky2R6s https://t.co/Te5ZKs2j0k
— New York Post (@nypost) October 27, 2026
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