There was a recent change in requirements regarding disclosure to women during their mammograms that having dense breast tissue increases their risk of breast cancer. This is important for women to know as early detection improves outcome. Have you been told if you have breast tissue density? https://www.medicinenet.com/script/main/art.asp?articlekey=219762
Mammograms are proven to save lives and this full disclosure of risk is meant to improve upon that. Women are recommended to have mammograms biannually between the age of 50 and 74.