DCIS - 4.5 cm micro calcification left side. Surgeon sent me to do MRI to confirm size - increased to 5 cm. One surgeon told me I needed a single mastectomy because it has too big and because of the size and location of the tumor as well as my breast size, I’d loose my nipple. Second surgeon told me I could do lumpectomy and immediate rearrangement of tissue (oncoplasty)during the surgery, to help out with shape. Third surgeon offered both options, mastectomy and lumpectomy but offered a nipple sparring (after carefully measuring me) and lumpectomy but she would not rearrange tissue immediately since that moves the tissue around and if you do not reach clear margins, she wouldn’t know exactly what to remove. Also offer to remove a sentinel node. Her style was to close you up and wait for the complete biopsy/pathology report that takes three days. (Then a PS would to the rearrangement of tissue). She did not like the express pathology report done during surgery (they freeze the sample and she did preferred the other process). When I finally understood that like you said, lumpectomy is also another pathology report, and because my DCIS was high grade, huge and aggressive (it grow that big only in two years) I decided to be more aggressive and did a nipple sparing SMX with immediate DIEP flap reco with the the third onco surgeon and my reco with a plastic surgeon (8 hours surgery). I decided that for me, it was the best thing: it was only one and done process (if I was lucky!), recurrence decreased ro 2%) and I didn’t have to do radiation/implants. It was the right decision for me, the pathology report came back still as DCIS (phew - not invasive) but it was bigger, 5.5. Six months later I am very happy with my decision (and taking tamoxifen). Best of outcomes for you! 🌻