(A) T1 group: Thyroid tissue showed normal with dilated thyroid follicles (DL) and it contains colloid in their lumen (CO). Also these follicles line by simple cuboidal epithelium (S). (B) T1 group: There is dilation of thyroid follicles (DL) with large amount of colloid (CO), thin interstitial tissue and normal simple cuboidal epithelium which lined thyroid follicles (S). 10X H & E.