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CMAJ • September 2, 2003; 169 (5)
© 2003 Canadian Medical Association or its licensors

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Case report

Recurrent hamburger thyrotoxicosis

Malvinder S. Parmar and Cecil Sturge

From the Medical Program (Internal Medicine), Timmins and District Hospital, Timmins, Ont. (Parmar), and the Department of Family Practice, Anson General Hospital, Iroquois Falls, Ont. (Sturge)

Correspondence to: Dr. Malvinder S. Parmar, Medical Program (Internal Medicine), Timmins and District Hospital, Suite 107, 707 Ross Ave. E, Timmins ON P4N 8R1; fax 705 268-8066; atbeat{at}ntl.sympatico.ca

RECURRENT EPISODES OF SPONTANEOUSLY RESOLVING HYPERTHYROIDISM may be caused by release of preformed hormone from the thyroid gland after it has been damaged by inflammation (recurrent silent thyroiditis) or by exogenous administration of thyroid hormone, which might be intentional or surreptitious (thyrotoxicosis factitia). Community-wide outbreaks of "hamburger thyrotoxicosis" resulting from inadvertent consumption of beef contaminated with bovine thyroid gland have been previously reported. Here we describe a single patient who experienced recurrent episodes of this phenomenon over an 11-year period and present an approach to systematically evaluating patients with recurrent hyperthyroidism.




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