Thyroidal radioactive iodine uptake in Iran.

The thyroidal uptake of iodine in 356 goitrous patients in Tehran and Mashad (two major cities in Iran) was studied. 131I was orally administered at the doses 10 to 50 microCi and the uptake was measured 2 and 24 hours following administration. The results demonstrate that the iodine deficiency is the main cause of goitre in these two cities and that the deficiency in Mashad is more severe than in Tehran.