Thyroid gland shows nodular adenomatous hyperplasia. Nodules are variable in size and composed of small and large crowded follicles full of thick colloid and lined by mature epithelium. Sections from some of the nodules show compact microfollicles devoid of colloid and lined by cuboidal cells separated by delicate vascular stroma. In these follicles nuclei are vesicular and look active but no appreciable mitosis. Stroma shows mild fibrosis. No evidence of hyperfunction or malignancy.
Thyroid lobectomy.
One thyroid lobe measured 4x3x1.5 cm, showing multiple nodules, ranging in size from 0.3 cm to 1x0.9 cm, having soft rubbery cut section. Thyroid capsule is intact.