<unk>  is an enlarged thyroid without hyperthyroidism. It is often present for years before toxic<unk><unk>  occurs. In the United States it is the most common cause of a large thyroid affecting between 3 and 5% of the population.
Nontoxic nodular goiter
Hashimoto's thyroiditis
Radiation-induced thyroiditis
Autoimmune thyroiditis
Thyroid adenoma
Subacute lymphocytic thyroiditis
Follicular thyroid cancer
Toxic multinodular goitre