Chorea due to hyperthyroidism in old age. A case report.

The authors discuss the case of an elderly female patient with thyrotoxicosis and chorea. T3 and T4 serum values were high. Since the chorea disappeared with euthyroidism but reappeared whenever there was a further increase in T3 and T4, its relationship on hyperthyroidism and its reversibility are clearly demonstrated. The chorea therefore appears to be another clinical condition present in hyperthyroidism.