[DanBC]

I think people need to understand that colorectal cancer isn't one thing. There are a range of cancers that occur in the colorectal system.

Finding a cancer earlier (in terms of staging) is probably a good thing. But finding a cancer earlier (in terms of age of the patient) possibly means they have a harder to treat, more aggressive, cancer. This might be why there's diminishing returns on population screening in younger people. Older people have easier to treat cancers and pre-cancerous polyps.