A study of Graves' disease in Iceland.

The incidence of Graves' disease and its response to treatment have been studied in Iceland, where the main environmental factor possibly affecting Graves' disease is a high iodine intake. The incidence was found to be similar or lower to that reported for Europe. The response to treatment with drugs and radioiodine does not differ from that found in other countries but recurrent hyperthyroidism after subtotal thyroidectomy is more common in Iceland.