New U.S. federal regulations will require mammography facilities to tell women if they have dense breasts, a description of how the tissue looks on the X-ray.
It can be more difficult to detect cancer in dense breast tissue on a mammogram. Having dense breasts is also a risk factor for developing breast cancer.
The U.S. Food and Drug Administration update amends regulations issued under the Mammography Quality Standards Act (MQSA) of 1992 (MQSA).
