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Letrozole and checking estrogen levels

Breast Cancer | Last Active: Feb 10 11:03am | Replies (70)
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@anjalima

I too inquired about having a baseline estrogen level before starting AI. I was told by oncologist that it isn’t necessary because the AI result they are looking for can’t be measured. AI blocks estradiol from converting to estrogen. But I still don’t understand why this ( baseline /change) cannot be measured.

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Replies to "I too inquired about having a baseline estrogen level before starting AI. I was told by..."
abcrider | @abcrider | Feb 10 11:03am

I agree! How do they know it works if it can’t it be measured?

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