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  • Title: Relationship between thyroid-stimulating antibodies and thyrotropin-binding inhibitory immunoglobulins years after administration of radioiodine for Graves' disease: retrospective clinical survey.
    Author: Yoshida K, Aizawa Y, Kaise N, Fukazawa H, Kiso Y, Sayama N, Mori K, Hori H, Abe K.
    Journal: J Endocrinol Invest; 1996 Nov; 19(10):682-6. PubMed ID: 9007700.
    Abstract:
    Thyroid-stimulating antibody (TSAb) activity and the TSH-binding inhibitory immunoglobulin (TBII) index were assessed in 158 patients with Graves' disease who had been treated with 131I 6-14 years earlier. Twenty-one patients (13%) were still hyperthyroid, 45 (28%) were euthyroid, 44 (28%) were subclinically hypothyroid, and 48 (30%) were overtly hypothyroid. Positive results were obtained in 10 (48%) of the 21 patients with hyperthyroidism for both TSAb and TBII assays, and in 3 patients (14%) in one of the assays. In contrast, only two (5%) patients with subclinical hypothyroidism and 1 (2%) patient with overt hypothyroidism tested positive in both assays, and 11 (25%) subclinically hypothyroid patients and 15 (31%) overtly hypothyroid patients tested positive in one of the assays. The correlation coefficients between TSAb and TBII were 0.88 (p < 0.01) in hyperthyroid patients, 0.49 (p < 0.01) in euthyroid patients, 0.34 (p < 0.05) in subclinically hypothyroid patients, and 0.12 (p > 0.05) in patients with overt hypothyroidism. Findings indicate the presence of long-term changes in the population of TSH receptor antibodies years after 131I treatment, which may influence thyroid function.
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