@turkay1-- Women with stromal fibrosis are at a higher risk of having breast cancer, that might be the reason why your friend's stromal fibrosis was removed.
By the way, when did this happen?
I'm curious because I know that doctors have learned new things about stromal fibrosis and fibrocysts. Ten years ago, doctors would almost always surgically remove these but they don't do this very often anymore. Instead, the patient is asked to return for ultrasounds every six months to see if there is any change.
My mom, for example, has had a fibroadenoma in her left breast for the past four years. She has been going for ultrasound check-ups every six months to see if it has grown or not. After five years, if there has been no change, she will only have to go once a year for checkups.
Doctors learn new things everyday so the way these things are treated is still changing and developing. Today, I don't think a doctor would decide to surgically remove a breast stromal fibrosis unless it is growing due to disease.