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Thyroid Gland, Follicular Cell - Hypertrophy - Gallery

Image of follicular cell hypertrophy in the thyroid gland from a male F344/N rat in a subchronic study
Thyroid Gland, Follicular Cell - Hypertrophy in a male F344/N rat from a subchronic study. Focal hyperplasia is present in two adjacent follicles (arrows).
Image of follicular cell hypertrophy in the thyroid gland from a male F344/N rat in a subchronic study
Thyroid Gland, Follicular Cell - Hypertrophy in a male F344/N rat from a subchronic study. Higher magnification of Figure 1 shows the epithelium lining the follicles is cuboidal to columnar.
Image of follicular cell hypertrophy in the thyroid gland from a male F344/N rat in a subchronic study
Thyroid Gland, Follicular Cell - Hypertrophy in a male F344/N rat from a subchronic study. The cuboidal to columnar lining epithelium contains small, clear, cytoplasmic vacuoles.
Image of follicular cell hypertrophy in the thyroid gland from a female Harlan Sprague-Dawley rat in a chronic study
Thyroid Gland, Follicular Cell - Hypertrophy in a female Sprague-Dawley rat from a chronic study. Follicles are smaller than normal, are lined by cuboidal epithelium, and contain amphophilic, flocculant-appearing material and exfoliated epithelial cells.
NTP is located at the National Institute of Environmental Health Sciences, part of the National Institutes of Health.