The hyperthyroid group consisted of 24 patients, and etiology of the hyperthyroidism was Graves’ disease (n = 23) and toxic multinodular goiter (n = 1). The hypothyroid group consisted of 17 women and the etiology of the hypothyroidism was chronic autoimmune thyroiditis (n = 6), radioiodine therapy (n = 6), withdrawal of thyroid hormone therapy before a total body scan for papillary thyroid carcinoma (n = 3), non-autoimmune hypothyroidism (n = 1) and postpartum thyroiditis (n = 1). The gene discussed is TG; the disease is hypothyroidism.