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Very-Early Onset Autoimmune Hypothyroidism: A Report of Two Cases with STAT3 Gain-Of-Function Variant




TekijätRavi, Rowmika; Niskanen, Anita; Reeve, Mary Pat; Makkonen, Kristiina; Niinikoski, Harri; Toppari, Jorma; Kero, Jukka

KustantajaBioscientifica

Julkaisuvuosi2025

Lehti: European thyroid journal

Artikkelin numeroETJ-25-0260

ISSN2235-0640

eISSN2235-0802

DOIhttps://doi.org/10.1530/ETJ-25-0260

Julkaisun avoimuus kirjaamishetkelläAvoimesti saatavilla

Julkaisukanavan avoimuus Kokonaan avoin julkaisukanava

Verkko-osoitehttps://doi.org/10.1530/etj-25-0260

Rinnakkaistallenteen osoitehttps://research.utu.fi/converis/portal/detail/Publication/505607672


Tiivistelmä

Autoimmune hypothyroidism occurs rarely before three years of age. Two siblings were diagnosed with autoimmune hypothyroidism at age five and 16 months, presenting with classic symptoms of hypothyroidism, abnormal thyroid function tests (TSH 200 and 660 mU/L; reference 0.73-8.4 mU/L; Free T4 5.9 and <1.3 pmol/L; reference 11.9-25.6 pmol/L), and high thyroid peroxidase antibody levels. Thyroxine medication alleviated their symptoms. Apart from mild infections, the siblings exhibited no other major disorders. Whole exome sequencing identified a pathogenic STAT3 gain-of-function variant, most commonly associated with infantile-onset multi-organ autoimmune disorder. Genetic testing for early-onset hypothyroidism may reveal specific etiologies, impacting follow-up and treatment.


Ladattava julkaisu

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Julkaisussa olevat rahoitustiedot
This study was supported by the Finnish Paediatric Society (Grant number 190001), the Sigrid Jusélius Foundation (Grant number 115-1956-26), and the Novo Nordisk Foundation (Grant number 0078329).


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