I was so very lucky that I made appointment w/ a breast surgeon because I have dense tissue and had lumpectomy for DCIS. Do I always had a breast surgeon check up yearly. Mt thought was they are in the business of checking working with breasts. IF there is something there, they will feel it. My first appointment w/ this new breast surgeon (I had moved to a new state) said ‘your mammogram shows all is fine, bit you have dense tissue, let’s do a MRI and see what’s in there. Thank God, he was proactive , as that MRI showed my tumor, which the 3D mammogram did not. I ended up having a mastectomy, on one side, as there three areas, 2 biopsied and 1 couldn’t be got to. With my history and 2 small areas he recommended mastectomy. Again be persistent and talking to a surgeon will be helpful. Blessings to you.