—Schneeberg again points out that silent thyroiditis appears to have a significant increase in the number of observed cases throughout different areas of the United States. An apparent epidemic of this disease occurred in central Nebraska last year, as reported by Kinney et al.1 They reported 54 cases in a three-month period for an incidence of three cases per 1,000 population. This suggests an infectious or contagious cause; however, their results of antibody studies were negative, as were ours in previous viral antibody studies.The cause of silent thyroiditis is unknown, and, at present, there are not even good theories about its cause or if it is only one disease. Postpartum thyroiditis in its thyrotoxic form is identical in its clinical course. As Schneeberg advocates, there is need for further studies to define the geographic distribution of silent thyroiditis and postpartum thyroiditis in the United States as
Nikolai TF. Frequency of Silent Thyroiditis-Reply. Arch Intern Med. 1985;145(12):2268–2270. doi:10.1001/archinte.1985.00360120140037
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