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Learn about thyroid nodules

Hyperthyroidism: Overactivity of the Thyroid Gland

There are several causes of hyperthyroidism. Most often, the entire gland is overproducing thyroid hormone. This is called Graves' disease. Less commonly, a single nodule is responsible for the excess hormone secretion.

Fine Needle Biopsy of Thyroid Nodules

This page is written assuming you have read the introductory page on thyroid nodules first. If you have not, please do so because it will make this page easier to understand.

Thyroid Gland Function

Some information on this page is a little more advanced. If you have trouble understanding the process of normal thyroid function, please go to our page describing this process first.
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