How important is it to take estrogen reducing meds? My breast cancer was stage I, grade 3, 3.3 cm. Removed with double mammoplasty at same time. I am 66. Lymph nodes neg, her2 neg ER and PR +. At my age, how likely is it that the cancer will return? And is Zometa important? One doc says yes, one says no! My dexa scan showed no osteoporosis or osteopenia. Thank you for your time!