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. There is focal infiltration by lymphocytes. These lymphocytes appear to form lymphoid follicles in some foci but no evidence of related follicular oxyphil change. One unremarkable parathyroid gland is observed. No evidence of hyperfunction or malignancy.
Clinical data was not submitted.
Thryoid lobe measures 6x4.2x3.3 cm showing an intact capsule and multinodular colloid cut section.
Thyroid lobe, excision: