If you’ve diligently undergone cancer screening tests for years, or perhaps decades, you might assume they should continue indefinitely — but that’s not typically the case. Most cancer screening guidelines recommend an upper age limit to cease testing, but “plenty of people get diagnosed with cancer when screenings end, so I think some people are surprised and confused when they’re told to stop,” says Timothy Rebbeck, a professor of cancer prevention at Harvard-affiliated Dana-Farber Cancer