I am in a very similar situation. I had excisional biopsy for Atypical hyperplasia and was diagnosed with DCIS based on pathology of the 4-mm tumor that was removed completely in the excision. No-brainer so far. I decided to not do radiation or hormone blocker because I am 65 and neither one seems to make more than a small difference in recurrence or survival. I am having another mammogram in 6 months and if everything looks ok, I’m good to do “watchful waiting.” If I were in my 20s or 30s, I think I’d go for the most aggressive treatment. It’s not an easy decision, but everyone has to consider the risks vs. benefits for their individual selves.