@Roberta,
Boidy, did they mention calcium deposits? About 12 years ago my biopsy showed a cluster of calcium deposits and I was scheduled for surgery. That was my 8th surgery, they removed the tissue that contained the deposits and none of it was cancer. They did call it precancerous, but at my next mammogram, the nurse mentioned more calcifications but when I asked about another biopsy, she seemed surprised. I demanded to see the radioligist but his explanation was so lacking in believability, I got another mammogram. The new radiologist provided a much better explanation, so I've been sticking with her.
So, try not to obsess, it's probably nothing, but I know it scared the living crap out of me. By the way the other 7 surgeries were all benign.