Study raises questions about value of breast cancer biopsies

Aired: 3/18/2015 | 0:05:00 | Clip
Breast biopsies are good for accurately diagnosing invasive cancerous cells, but are less accurate when it comes to finding other abnormalities, according to a new study. This means many women may receive unnecessarily aggressive treatment. Hari Sreenivasan learns more about the findings from lead author Dr. Joann Elmore of the University of Washington.