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Thyroid-stimulating immunoglobulins and thyroid function tests in two siblings with neonatal thyrotoxicosis

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Abstract

Thyroid function and serum TSI levels in two siblings with neonatal thyrotoxicosis are described. The first infant was treated with exchange transfusion and potassium iodide. The second infant was treated with intrauterine propylthiouracil followed by potassium iodide. In contrast to the first infant, the second infant had no clinical sign of neonatal thyrotoxicosis. He also had lower TSI levels with a biological halflife of 5 days. Only one of three assays showed some TSI activity in breast milk.

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Abbreviations

TSI:

thyroid-stimulating immunoglobulins

LATS:

long-acting thyroid stimulator

LATS-P:

LATS protector

TSAb:

thyroid-stimulating antibody

TRAB:

TSH receptor antibodies

PTU:

propylthiouracil

TBG:

thyroxinbinding globulin

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Wit, J.M., Rees-Smith, B., Creagh, F.M. et al. Thyroid-stimulating immunoglobulins and thyroid function tests in two siblings with neonatal thyrotoxicosis. Eur J Pediatr 145, 143–147 (1986). https://doi.org/10.1007/BF00441879

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  • DOI: https://doi.org/10.1007/BF00441879

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