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.

The American Cancer Society says an uptick in colon cancer cases in the 45-49 age group is a result of lowered screening ages leading to earlier detection.

The ACS in 2018 started recommending that people with average risk as young as 45 years old get screened for colorectal cancer, down from the previous start of age 50. The U.S. Preventive Services Task Force followed in 2021; their guidelines carry particular weight among primary-care providers and often lead to health-insurance coverage.