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Thyroid Gland, Follicle - Mineralization

Image of follicle mineralization in the thyroid gland from a male F344/N rat in a chronic study
Thyroid gland, Follicle - Mineralization in a male F344/N rat from a chronic study. There is focal mineralization within the colloid of two follicles.
Figure 1 of 2
Image of follicle mineralization in the thyroid gland from a male F344/N rat in a chronic study
Thyroid gland, Follicle - Mineralization in a male F344/N rat from a chronic study. Higher magnification of Figure 1 Shows the focal mineral deposits in more detail.
Figure 2 of 2
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comment:

Mineralization within solitary thyroid follicles is occasionally seen in adults and may appear as granular basophilic deposits not associated with inflammation.

recommendation:

Mineralization in the thyroid follicles is an incidental finding and should be documented and given a severity grade only when severe or suspected of being treatment related.

references: