NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 8,177 terms related to cancer and medicine.

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heterogeneously dense breast tissue
(HEH-teh-roh-JEE-nee-us-lee dents brest TIH-shoo)
A term used to describe breast tissue that is made up of mostly dense fibrous tissue and glandular tissue and also has some fatty tissue. On a mammogram, the dense areas of the breast make it harder to find tumors or other changes. 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.