NON-ADENOMATOUS INAPPROPRIATE TSH HYPERSECRETION AND EUTHYROIDISM REQUIRES NO TREATMENT

Abstract
The syndrome of inappropriate TSH secretion is described in a euthyroid girl and her father. Based on nuclear T3 binding studies in fibroblasts, generalized tissue resistance was associated with a lower binding affinity for T3 in nuclear extracts suggestive of a structurally abnormal receptor for T3. Early recognition of the syndrome and observation of the short‐term response to thyroid medication prevented unnecessary trials of antithyroid medication and later radical ablative thyroid treatment.

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