<unk>  is generally caused by an immune system attack on the thyroid, resulting in inflammation and damage to the thyroid cells. This disease is often considered a malfunction of the immune system and can be associated with IgG4-related systemic disease, in which symptoms of autoimmune pancreatitis, retroperitoneal fibrosis and noninfectious aortitis also occur. Such is also the case in Riedel<unk> , an inflammation in which the<unk> sue is replaced by fibrous tissue which can extend to neighbouring structures. Antibodies that attack the thyroid are what causes most types of<unk> . It can also be caused by an infection, like a virus or bacteria, which works in the same way as antibodies to cause inflammation in the glands, such as in the case of subacute granulomatous<unk>  (de Quervain). Certain people make thyroid antibodies, and<unk>  can be considered an autoimmune disease, because the body acts as if the thyroid gland is foreign tissue. Some drugs, such as interferon, lithium and amiodarone, can also cause<unk>  because they have a tendency to damage thyroid cells.
Thyroiditis
Pharyngitis
Thyroid cancer
Thyroid nodule
Thyroid neoplasm
Goitre
Thyroid lymphoma
Thyroid storm