thyroid gland diseases
Thyroid disorders can cause the thyroid gland to become overactive (hyperthyroidism) or underactive (hypothyroidism). Thyroid disorders are most often due to autoimmune thyroid diseases, such as Graves' disease and Hashimoto's thyroiditis.The most common thyroid disorders that result in hyperthyroidism include thyroid nodules and Graves' disease.hyroid disorders are most often due to autoimmune thyroid diseases, such as Graves' disease and Hashimoto's thyroiditis. The most common thyroid disorders that result in hyperthyroidism include thyroid nodules and Graves' disease.