Colorectal Cancer Uptick in Under-50s Leaves Scientists Puzzled
Colorectal cancer diagnoses are rising among people under 50 in some countries, even as overall rates remain low and mortality from cancer continues to fall. The reasons remain unclear, with hypotheses ranging from increased testing and better cancer registries to speculative environmental factors; country-by-country differences complicate the pattern. Obesity may contribute but doesn’t fully explain the uptick, and researchers emphasize that the exact cause is still mysterious.
