Heterogeneously dense indicates that some areas of non-dense tissue were found, but the majority of the breast tissue is dense. About 40 percent women have this result. Extremely dense indicates that nearly all the breast tissue is dense. About 10 percent of women have this result.

What does heterogeneously dense mean on mammogram?

C: Heterogeneously dense indicates that there are some areas of nondense tissue, but that the majority of the breast tissue is dense. About 4 in 10 women have this result.

How often does dense breast tissue turn into cancer?

The automated software found dense breasts in 28 percent of their screening tests. The rates of cancer were 6.7 per 1,000 exams for women with dense breasts and 5.5 for women with non-dense breasts, according to the findings. "This study really shows that women with dense breasts did have more cancers.