Breast tissue density

Breast tissue is comprised mainly of glandular and fat tissue, with the ratio varying from woman to woman. The denser the breast, the more glandular tissue it has compared with fat tissue.Dense glandular tissue is a normal finding particularly in women of childbearing age. Usually as females age the breast tissue becomes less glandular and the glandular tissue gets replaced with fat.Dense tissue is becoming more recognized as requiring additional screening tests, such as MRI or ultrasound. Having dense breast tissue makes breast screening with mammography challenging.