Mine was Stage 1 IDC ER/PR positive and HER2 negative I was 65 at the time of surgery. I chose lumpectomy with breast reduction alone because my post surgery biopsy showed no lymph nodes and clear margins. For me was the place where it was located they could not assure me 100% that I would not have any heart issues because I would have had radiation directly above my heart. I can appreciate you looking at numbers and thinking the odds are in your favor! My chance of a recurrence was less than my chance of having permanent heart damage, so I chose to forego it as well as hormone therapy. The hormone therapy had less than 2 % chance of preventing anything and a horribly high risk of side affects.