Breast Cancer - Screening

Hormones May Harm Mammogram Accuracy
Hormone replacement drugs not only increase breast cancer risk. They may also make it harder to spot if it does occur. Hormones can cause breast tissue to become denser, making it more difficult to detect cancerous cells by mammography, according to a study published in the Journal of the American Medical Association. Researchers report that changes in breast density usually reverse if hormone therapy is discontinued, and that overweight women are more likely to be affected.

Rutter CM, Mandelson MT, Laya MB, Taplin S. Changes in breast density associated with initiation, discontinuation, and continuing use of hormone replacement therapy. JAMA. 2001;285:171-6.

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