My DCIS is Stage 0 - Grade 3. The way it was explained to me is Grade 3 is “aggressive” and radiation is part of the program. 3 weeks of radiation was thrown around but I will not know until my appt with the doc. This will happen Aug 26. I’ve been questioning having radiation as well. My lumpectomy per the doc removed the calcifications which were 4cm, she had good margins and no surprises. I’ve been wondering this too and have been chatting with friends who have experienced BC and everyone says “do it” but their BC was more involved, not DCIS which has been explained to me as “pre-cancerous”. Thanks for asking the question, I’m wondering as well.