What is the difference between hypothyroidism and Hashimoto's?
Hypothyroidism and Hashimoto’s are not interchangeable terms. Hypothyroidism — an underactive, non-functioning, or missing thyroid gland — is a condition with many causes. Hashimoto’s disease — also known as Hashimoto’s thyroiditis — is an autoimmune disease, and is the most common cause of hypothyroidism in many parts of the world. Some people have Hashimoto’s disease — evidenced by elevated thyroid peroxidase (TPO) antibodies — without being hypothyroid. Most people with Hashimoto’s disease, however, do eventually become hypothyroid over time.