By Liz Szabo, USA TODAY
Screening women with both ultrasounds and mammograms allows doctors to find more breast cancers than if they rely on mammograms alone, a new study shows. However, the combination also leads to many more unnecessary biopsies, and experts don't recommend it to most patients.
Researchers involved in a study of more than 2,600 women in today's Journal of the American Medical Association focused on women at high risk, such as those who have had previous breast tumors.
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