In the U.S., false-positive mammograms cost $4 billion annually

A woman prepares to have a mammogram.
(Image credit: iStock)

New research has found that false-positive mammograms cost the U.S. $4 billion a year.

False-positives can occur because what looks like a tumor on an X-ray can actually be a cyst or a growth that later disappears. Mei-Sing Ong and Dr. Ken Mandl of Boston Children's Hospital studied false-positive mammograms and breast cancer overdiagnoses among more than 700,000 women between the ages of 40-59 from 2011 to 2013, NBC News reports.

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Catherine Garcia, The Week US

Catherine Garcia is night editor for TheWeek.com. Her writing and reporting has appeared in Entertainment Weekly and EW.com, The New York Times, The Book of Jezebel, and other publications. A Southern California native, Catherine is a graduate of the University of Redlands and the Columbia University Graduate School of Journalism.