What is a thyroid disorder?

Diseases of the thyroid gland are very common, affecting millions of Americans. The most common thyroid problems are: An overactive gland, called hyperthyroidism (e.g., Graves’ disease, toxic adenoma or toxic nodular goiter) An underactive gland, called hypothyroidism (e.g., Hashimoto’s thyroiditis) Thyroid enlargement due to overactivity (as in Graves’ disease) or from under-activity (as in hypothyroidism).… Read more »