@shorty0650: I was in a similar situation 11 months ago. Same breast, same type cancer, 12 mm, so a little smaller than yours. Based on the ONCO type score, my oncologist and my radiologist agreed that radiation would not significantly change the outcome, so I decided against it. Also, I was told that the decision regarding radiation is not urgent, you have several months to think about it and change your mind, with no consequences (so I’ve been advised). Regarding ER blockers, I, too, read the horror stories and bad reactions that some patients have had. I did experience some fairly noticeable joint pain in my hips for the first 6 to 8 weeks, but then it subsided. So far no recurrence, either of cancer, nor joint pain. And - I was diagnosed 1 month before turning 72, so a very similar case.