I would suggest that you contact your future daughter-in-laws Physician or her directly. A person's medical condition is theirs and theirs alone and it would not be proper to advise or second guess a person's personal Physician,. I think any information you obtain would be best coming from the pt. herself if she desires to share it. Thank you ......
One additional comment: I do not see the word "Atypia" in the diagnosis you mentioned.
I have a Chinese fiance, and she has just told me she has been to the doctor for the same problem. She had pain in her breast and was worried it might be breast cancer and went to her doctor. She was told she had the same thing. Everytime I look on the internet, all links to this subject appear to be related to China. Is this a Chinese problem that does not affect other women of the western world?
I am no wiser about this condition other than it can develop into a mastectomy if not treated or found early enough. So I am sorry that I cannot help you.
I would like to add, that I am so in love with this woman that I don't care that she has this disease. I will marry her no matter what happens, but my thoughts and hopes are that she will be fine and we will continue our relationship and eventually marry. She is younger than me, but I will stand by her all the way. I hope your son feels the same way about his fiance.