A study found half of all women will experience at least one false positive mammogram over a decade of annual breast cancer screening with digital breast tomosynthesis (3D mammography). The risk of false positive results after 10 years of screening is lower in women screened every other year. A false positive is when a mammogram is flagged as abnormal, but there is no cancer in the breast. It also showed that repeated screening with 3D mammography only modestly decreases the chance of having a false positive result compared with the standard digital 2D mammography. Other factors more strongly linked to...