heterogeneously dense breast tissue

A term used to describe breast tissue that has large areas of dense fibrous tissue and glandular tissue and also has some fatty tissue.  The dense areas of the breast make it harder to find tumors or other changes on a mammogram.  Heterogeneously dense breast tissue is one of four categories used to describe a level of breast density seen on a mammogram.  About 40% of women have this type of breast tissue.

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