IODINE-INDUCED HYPERTHYROIDISM DUE TO NONIONIC CONTRAST RADIOGRAPHY IN THE ELDERLY

Abstract

PURPOSE: To identify the number of cases of hyperthyroidism that followed the performance of contrast radiography in elderly patients at a geriatric hospital in a non-iodine-deficient area and to determine the clinical course of the condition. PATIENTS AND METHODS: All patients over a 20-month period with biochemical hyperthyroidism (plasma free thyroxine level greater than 25.0 pmol/L and thyroid-stimulating hormone level less than 0.10 IU/L) were identified. Clinical features of hyperthyroidism and exposure to nonionic contrast media radiographs within the previous 12 months were sought. Follow-up extended from 6 to 22 months. RESULTS: A total of 28 patients with hyperthyroidism (aged 70 t..