THYROTOXICOSIS (HYPERTHYROIDISM)



Thyrotoxicosis, a common clinical condition consequent to excess thyroid hormone, can be caused by a number of different disorders; these should be differentiated in the individual patient for proper management (Table 68-2). Graves’ dis­ease is the most common cause in young individ­uals, whereas toxic nodular goiter is more prev­alent in the elderly. Transient thyrotoxicosis is frequently associated with thyroiditis. Also ex­posure to iodide (contrast studies) and iodine-containing drugs (e.g., amiodarone) has become a relatively common cause of thyrotoxicosis. The other conditions listed are relatively rare.





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