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AI’s after 10 years?

It has been many years since I checked in but it’s so wonderful to see how much this thread has grown! I remember clinging to the hope here when I was first diagnosed, and now am myself more than 13 years out from my stage 3 diagnosis!

My question for this wise group is how many of you have remained on an AI for more than 10 years, and what do your doctors tell you about the risk of continuing vs not? I did tamoxifen for a year and have been on letrozole for almost 12 years. My instinct is to stay on it, but at my annual visit yesterday my provider told me that if you stay on indefinitely you can actually start to build a resistance, so if your cancer ever comes back it might not work as a front line treatment. I hadn’t heard that before and am wondering if other have? What have been your thoughts about stopping vs continuing?