[Restandardization of thyroid uptake indices in patients with euthyroidism using 131I]

The authors studied 454 patients in order to review the thyroid uptake pattern in São Paulo. They were submitted to clinical examination and hormone dosages (T3, T4 and TSH). Two hundred and fifty-four patients (55.9%) were excluded because they had hormonal dosages out of the normal range of substernal, diffuse and multinodular goiter, or were younger than 12. The 200 remaining patients (44.1%) were included in the euthyroidism group and the results were as follows: 2 hours thyroid uptake = 3 to 12%; 24 hour thyroid uptake = 8 to 32%.