I had DCIs stage 0 grade 3 as well. I choose to have a lumpectomy plus radiation. Soon I will be starting tamoxifen. The area was very small and caught early. The surgeon was not bad at All. I did not take the pain meds, just some Advil and Tylenol. Finished radiation two weeks ago. Went ok. Just some mild pains in breast and some redness. Which is now healing. Good luck with your decision. Listen to your doctors. They will help you make the right choices.