Abstract
Thyroid-stimulating immunoglobulins (TSIs) were measured by radioreceptor assay in serum from 51 patients with a multinodular goitre, divided into four groups according to thyroid function, and in 30 normal people. In 9 patients who were euthyroid and had non-autonomous thyroid function and in 6 patients who were hyperthyroid, TSI index was normal. Of 21 euthyroid patients with autonomous function only 2 had a slightly abnormal TSI index (66 in both, normal ≥68). Another series of 15 clinically euthyroid patients also had a normal TSI index. These results suggest that TSIs do not contribute to the pathogenesis of multinodular goitre, as has been suggested by others.
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