Hyperthyroid chorea in an elderly woman associated with sole elevation of T3

A 72-year-old woman presented with chorea, mild tachycardia, and elevation of T3RIA. T4 was not elevated until the third determination. Chorea resolved with treatment of hyperthyroidism. This case represents the first case of T3 hyperthyroid chorea and the oldest patient with hyperthyroid chorea described in the literature. It demonstrates yet another subtle way in which thyroid disease can present in the elderly.