Histological Features of the Thyroid Gland

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The page below is a sample from the LabCE course Laboratory Assessment of Thyroid Function (retired 3/27/2020). Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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Histological Features of the Thyroid Gland

Histologically, the thyroid gland is organized as epithelial cells surrounding colloid-containing pools, called follicles. The colloid is rich in thyroglobulin, a protein possessing many tyrosine residues to which iodine molecules attach to form the thyroid hormones.

Thyroid follicles