Thyroid nodules. Light micrograph of a section through a thyroid gland with colloid adenomas, or nodules (botom right and upper left)). The nodules ar

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Thyroid nodules. Light micrograph of a section through a thyroid gland with colloid adenomas, or nodules (botom right and upper left)). The nodules are filled with colloid, a glycoprotein storage form of the thyroid hormones, and encapsulated in fibrous tissue (white). The nodules can lead to an enlargement of the thyroid gland and overproduction of thyroid hormone.

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Photo credit: © BIOPHOTO ASSOCIATES/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
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