| Summary: | Annually, more than 250 000 US women are diagnosed with breast cancer and are recommended for yearly surveillance mammography for second cancers after treatment completion. Many also receive breast magnetic resonance imaging (MRI), without evidence of effectiveness. In this study, the research team looked at how often mammograms and breast MRIs found second breast cancers. To do this, the team looked at health records of breast cancer survivors from a cancer registry. The registry combines data from sites across the country and includes information about women with previous breast cancers who had mammograms and breast MRIs. In the research results, when doctors used a breast MRI with or without a mammogram, they were more likely to find cancer than when they used a mammogram alone. Breast MRIs also led to more biopsies. Biopsies confirm whether a tissue sample is cancer or not. But they may cause scarring, pain, or infection
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