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Acute infectious thyroiditis : ウィキペディア英語版 | Acute infectious thyroiditis
Acute infectious thyroiditis (AIT) also known as suppurative thyroiditis, microbial inflammatory thyroiditis, pyrogenic thyroiditis and bacterial thyroiditis.〔Melmed, Shlomo, Kenneth S. Polonsky, and P. R. Larsen. (thyroiditis vs subacute thyroiditis diagnosis criteria ) "Acute InfectiousThyroiditis." Willams Textbook of Endocrinology. By Henry M. Kronenberg. 11th ed. Philadelphia: Elsevier, 2008. 945-47.〕〔Lazarus, John, and James Hennessey. () "Acute and Subacute, and Reidel’s Thyroiditis." Ed. Leslie J. De Groot. The Thyroid And Its Diseases. 6th ed. New York: Elsevier, 1996.〕 The thyroid is normally very resistant to infection. Due to a relatively high amount of iodine in the tissue, as well as high vascularity and lymphatic drainage to the region, it is difficult for pathogens to infect the thyroid tissue. Despite all this, a persistent fistula from the piriform sinus may make the left lobe of the thyroid susceptible to infection and abscess formation.〔 AIT is most often caused by a bacterial infection but can also be caused by a fungal or parasitic infection, most commonly in an immunocompromised host. ==Epidemiology== Acute infectious thyroiditis is very rare, with it only accounting for about 0.1-0.7% of all thyroiditis. Large hospitals tend to only see two cases of AIT annually.〔 For the few cases of AIT that are seen the statistics seem to show a pattern. AIT is found in children and young adults between the ages of 20 and 40. The occurrence of the disease in people between 20 and 40 is only about 8% with the other 92% being in children. Men and women are each just as likely to get the disease.〔 If left untreated, there is a 12% mortality rate.〔
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