My husband's niece recently died of colon cancer. It was found as the result of a random screening when she was in her 30s (a Kaiser Permantie study). Because of that, and subsequent treatment, she lived long enough to know her grand children. Subsequently her father was found to have colon cancer so it may be familial.
Older women (the age of many of your Mothers) can probably appreciate this better but.. I am well endowed.
When I kidded with the radiation oncologist about dreaming of breast reduction she observed that I had some tissue to spare and to mention that to my surgeon (aka, no reason to back-fill). One of the radiation options typically results in long term ... firmness.
This has been a real education.
This all may seem disrespectful of those who are/were diagnosed with advanced breast cancer for whom the diagnosis is a life and death matter. That is not my intention at all. I sincerely wish that their cancer had been identified early. It is incumbent on each of us to do what we can to give our health care providers the opportunity to preserve our health trough preventive screening, to become partners in preserving our quality of life. I wish all of you had been as lucky as I. Encourage your mother's, sister, and wives to have mammograms even after years of benign results when more tests seem senseless.
What is important is to know the best way to identify potential problems: routine screening where the radiologist can compare results over time.