If something suspicious is found on a mammogram, what is the chance that it might be breast cancer?
Approximately 10% of screening mammograms are called back for additional imaging evaluation, which involves diagnostic mammography views and/or ultrasound. Of those that are called back, only about 10% of those require biopsy (90% are either explained as benign findings or simply require short-term follow-up). Of those that are biopsied, only about 30% actually are cancer. Another way to put this is that out of 1,000 screening mammograms performed, approximately 5 patients will be found to have cancer.