I am glad you are here, because there are quite a few breast cancer patients with different experiences to visit with. I did not take lupron, however I did have breast cancer in my thirties and the doctors tend be a little more aggressive with treatments with younger women. Although your daughter is 42, and I have mostly read that under 40 is considered “young for breast cancer”, under 40 is only 2 years away and I don’t think cancer cares. Women under 40 tend to have more aggressive breast cancers, added to the fact that she has multiple tumors at diagnosis might make the doctors more likely to want to treat her more aggressively. I definitely would encourage her to get a second opinion if that is reasonable for her. If you don’t mind me asking, did she have a bilateral or single mastectomy?