Breast density would be included in a mammography report under a bill proposed in the California Senate. What that would mean for women is receiving a score of 1 to 4 to help her and her doctor better assess her individual risk of developing breast cancer.
The risk of breast cancer is based on several factors: age, family history, previous breast biopsies, gene mutations and density. Having high-density tissue, which has less fat, raises breast-cancer risk; low-density tissue lowers it. Very dense breast tissue is harder to read on a mammogram.