Hashimoto's Thyroiditis Anatomy
To better understand Hashimoto's thyroiditis, it helps to understand the anatomy of the thyroid gland.
The thyroid is a butterfly-shaped organ located in the neck, next to the Adam's apple.
The thyroid gland is responsible for regulating the body's metabolism. The thyroid gland produces thyroid hormones, which stimulate metabolism. Thyroid hormones are normally present in the bloodstream in tiny quantities. Too much thyroid hormone in the bloodstream is called hyperthyroidism. When there is too little, the condition is referred to as hypothyroidism.
Inflammation or over-activity of the thyroid gland can cause swelling or goiter.
- Kon YC, DeGroot LJ. Painful Hashimoto's thyroiditis as an indication for thyroidectomy: clinical characteristics and outcome in seven patients. J Clin Endocrinol Metab. 2003 Jun;88(6):2667-72. 
- Ohye H, Fukata S, Kubota S, Sasaki I, Takamura Y, Matsuzuka F, Amino N, Kuma K, Miyauchi A, Kakudo K. Successful treatment for recurrent painful Hashimoto's thyroiditis by total thyroidectomy. Thyroid. 2005 Apr;15(4):340-5. 
- Vitti P, Rago T, Mazzeo S, Brogioni S, Lampis M, De Liperi A, Bartolozzi C, Pinchera A, Martino E. Thyroid blood flow evaluation by color-flow Doppler sonography distinguishes Graves' disease from Hashimoto's thyroiditis. J Endocrinol Invest. 1995 Dec;18(11):857-61.