I won’t wear out the debate on mammography.
Here are the recommendations that focus on the high risk BRCA genetic trait. You might recall a very intense debate on mammogram screening of young women and then another debate on prophylactic mastectomy. Lots of strong opinions, the rate of cancer of the breast is very, very age related with a few exceptions.
http://acsh.org/2013/12/task-force-updates-breast-cancer-screening-recommendations/