Breast Density

The breast contains ducts, glands, fibrous connective tissue, and fatty tissue. Breasts that are dense or very dense have a lot of fibrous, connective tissue and less fatty tissue. While virtually all women start out with very dense breast tissue, this typically changes over time.

In 2007, researchers reported findings that suggested breast density not only made it harder to find cancers, but was also was as an independent predictor of breast cancer risk.