Hi @Christine_66,
I'm sorry you are facing this again. These are confronting choices. I'm wondering about the delay between your surgery (with clear margins, thankfully) and either radiotherapy or mastectomy. I don't want to add to your anxiety, it's just that when I had surgery with clear margins there was concern about the delay between surgery and commencement of radiotherapy or chemo. I was told they had to commence one or the other within twelve weeks, ideally. Mine was invasive stage 2, not DCIS. Maybe the issue is not applicable to DCIS. All the best, Lx