10 years ago I had a nuclear grade 3 DCIS. Before knowing the grade, I opted for a mastectomy. I had two nodules on the lung (eventually deemed benign) and I didn't want to radiate that area unnecessarily. So for me, mastectomy seemed like the best option with a 2% chance of recurrence, compared to lumpectomy and radiation with a 13-15% chance of recurrence. It was a no brainer for me. My dr did a sentinel node biopsy. Found clusters of cancer cells. She then took out 4 or 5 surrounding nodes which were all negative. My report came back risk of micro-invasion. I still don't understand it. I asked my dr at that time and she said cancer cells could have been pushed in when dye was injected. I should go home and that I was fine. I took this to mean that they don't know if there is or isn't micro-invasion and maybe 10 years later I'll wake up with metastatic cancer? I just don't know what it means. I've gone on with my life and tell myself I don't have cancer. And honestly I've been taking care of my husband for years who had stage 4 cancer and my focus was him. But now that I'm 10 years out, any pain I get as I age, I think that's micro invasion. I really don't understand and how do they follow up with "risk of micro invasion". I'm vigilant with exams and mammos/ultra.