Thyroid Gland, Follicle - Pigment

Thyroid gland, Follicle - Pigment in a male F344/N rat from a subchronic study. Dense pigment deposits are present in the follicular epithelium and colloid.

Thyroid gland, Follicle - Pigment in a male F344/N rat from a subchronic study. Higher magnification of the pigment deposits in the follicular epithelium colloid in Figure 1.