Hi Taiter​ I too was diagnosed with high grade DCIS toward the end of last year. I opted for a double mastectomy and immediate recon. The DCIS was on the right side of my right breast however when they sent the breast off to pathology, they discovered a larger amount of DCIS on the left side of the right breast, so I was ever so thankful I had the mastectomy. (My breasts were very dense which apparently makes it incredibly hard to detect cancer) My sentinel node showed no sign of cancer so I didn't require any further treatment which was great. There are two private groups you could join - the reconstruction group and the remaining flat group to get a better understanding of what is involved if you do need a mastectomy.
All the best with your journey
