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ASCO's news release about the screening study laments the "unfortunate" low rate of lung cancer screening and calls for an awareness campaign to encourage more smokers to get screened. Missing is discussion of legitimate reasons smokers might have to decline screening including substantial harms and a modest benefit. Following ASCO's lead, Bloomberg and HealthDay both echoed dramatic language about the finding without providing any perspective from independent experts who might voice reservations about screening.

Last week, the American Cancer Society published new guidelines that call for colorectal cancer screening to begin at age 45 - five years earlier than the group had previously recommended. But some experts are saying not so fast. The new recommendation was made in reaction to increasing rates of colorectal cancer among people younger than 50. But while the rise in cancers among this younger age group is troubling, this new recommendation was made before we know what's behind the new trend. And it's not clear that screening can help.It makes intuitive sense to respond to increasing rates of colon cancer among young people by lowering the screening age, said Michael Hochman, director of the the Gehr Family Center for Health Systems Science at the Keck School of Medicine in Los Angeles. "But if I had a quarter for every time in medicine that we were tricked by an idea with intuitive appeal, I'd be a rich man," Hochman said.

An opinion piece in last week's Annals of Internal Medicine argues that just how aggressively we screen for some cancers can actually distort our understanding of the risk factors for a particular cancer, as well as how common we perceive it to be.