HRT Affects Mammograms
Women undergoing hormone replacement therapy (HRT) may be affecting the accuracy of their screening mammograms.
A new study found HRT affects the density of breast tissue, a major factor in being able to accurately detect masses on a mammogram.
Researchers looked at what happens to the density of breast tissue when women start and stop HRT. They found the initiation of HRT increases breast density while discontinuing HRT reduces the density. Previous studies have directly linked density with the sensitivity of screening mammogram. A link has also been found between breast density and breast cancer.
The study, reported in the Journal of the American Medical Association, compares the breast density of more than 5,000 postmenopausal women between the ages of 40 and 96. Each had two screening mammograms during the study period.