(FOX NEWS) In a major shift, the American Cancer Society is recommending that women at average risk of breast cancer get annual mammograms starting at age 45 rather than at age 40, and that women 55 and older scale back screening to every other year.
The new guidelines, published on Tuesday in JAMA, fall more closely in line with guidelines from the U.S. Preventive Services Task Force, a government-backed panel of experts that recommend biennial breast cancer screening starting at age 50 for most women.
The Task Force's 2009 recommendations to reduce the frequency and delay the start of mammogram screening were based on studies suggesting the benefits of detecting cancers earlier did not outweigh the risk of false positive results, which needlessly expose women to additional testing, including a possible biopsy.
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