In the United States, the most common cause of goiter is Hashimoto’s thyroiditis, says Dr. Barlow. This is an autoimmune disorder that causes hypothyroidism, or an underactive thyroid. The body’s ...

Goiter is an abnormal enlargement of the thyroid gland, the butterfly-shaped gland at the base of the neck. While iodine deficiency is a major global cause, both too little and too much iodine can ...

Thyroid cancer surgery involves removing part or all of the thyroid gland to treat cancerous growths. It is the primary treatment for most thyroid cancers. Thyroid cancer develops when cells in the ...