Screening Cancer

A new study reveals mammograms may not be doing much good

The Cancer-Prevention Mantra "the more screening, the better" just took another hit. After following nearly 90,000 women for 25 years, a group of researchers in Canada found that women who got mammograms every year for five years were no less likely to die of breast cancer than those who did not. The study supports the controversial recommendation in 2009 of the U.S. Preventive Services Task Force (USPSTF) that women cut back on yearly mammograms and start at age 50 instead of age 40.

The main reasons: overdiagnosis and overtreatment. When a mammogram detects an irregularity, there's a natural urge to correct...

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