Figure 9.

A section in the thyroid gland of adult rat treated with low toxic dose of MSG (group III) showing some irregular thyroid follicles with discontinuity of their basement membrane (arrow), other with columnar epithelial lining (zigzag arrow). Multiple pyknotic nuclei are seen in both follicular lining epithelial (crossed arrow) and interfollicular cells (tailed arrow). The central colloid contained multiple exfoliated cells (arrow head).Note, the presence of hyperplasia of the lining epithelium of follicular cells (curved arrow) (H&E × 400).