3.2.3. Protective group (potassium dichromate + vitamin C)
Examination of semi-thin sections obtained from the thyroid glands of rats of the protective group revealed improvement in the histological changes detected in the previous group. The thyroid gland started to regain its normal architecture. The densities of colloid staining were also variable. However, some follicles still disrupted with desquamated cells in the lumens. The thyrocytes appeared less vacuolated. The interfollicular spaces appeared narrower than the treated group (Fig. 10 and Fig. 11).
The basal lamina of the thyroid follicles showed apparent increase in the PAS reaction but less than the control group. The colloid showed variable degrees of PAS reaction and still vacuolated (Fig. 12).