A Answers (1)
Multiple Sclerosis Foundation answeredA thyroid goiter is a swelling of the thyroid gland. While iodine deficiency is the most common global cause of goiter, it is by no means the only cause (especially in the United States). Other causes include some processes that lead to both hyperthyroidism and hypothyroidism. It should be noted that Hashimoto's thyroiditis is a common cause of goiter and is an autoimmune disease that occurs in some people with multiple sclerosis (MS).