Hyperthyroidism in the elderly. II. Laboratory tests.

The paraclinical findings in 100 elderly hyperthyroid patients were analysed. T3-thyrotoxicosis was found in 26% of the patients and T4-thyrotoxicosis in 7.6%. T3-thyrotoxicosis was found in 50% of the cases of toxic adenoma investigated. Hypomagnesiemia and hypocholesterolemia were found in 40.4% and 20.41%, respectively, and low values of Achilles' reflex test were found in 38.4%.