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Old 03-25-2006, 02:16 PM   #1
Senior Veteran
Join Date: Feb 2005
Location: East Texas
Posts: 873
Is there a link between breast cancer and thyroid cancer?

How many on here have had both breast cancer and thyroid cancer?

I do know that when you have had breast cancer and have to take the estrogen blockers such as tamoxifen and femera, that interferes with your thyroid hormone levels and it is hard to regulate them. I also believe that these drugs (or maybe it is what the drugs do to your female hormone levels) give you some of the same symptoms as hypothyroidism and that makes it hard to tell if it is your thyroid causing all the problems.

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