The Clinical Spectrum of Resistance to Thyroid Hormone Alpha in Children and Adults

Resistance to thyroid hormone alpha occurs due to pathogenic, heterozygous variants in THRA. The entity was first described in 2012 and to date only a small number of patients with varying severity have been reported. In this review, we summarize and interpret the heterogeneous clinical and laborato...

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Main Authors: İbrahim Mert Erbaş, Korcan Demir
Format: Article
Language:English
Published: Galenos Yayincilik 2021-03-01
Series:JCRPE
Subjects:
Online Access: http://www.jcrpe.org/archives/archive-detail/article-preview/the-clinical-spectrum-of-resistance-to-thyroid-hor/37340
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author İbrahim Mert Erbaş
Korcan Demir
author_facet İbrahim Mert Erbaş
Korcan Demir
author_sort İbrahim Mert Erbaş
collection DOAJ
description Resistance to thyroid hormone alpha occurs due to pathogenic, heterozygous variants in THRA. The entity was first described in 2012 and to date only a small number of patients with varying severity have been reported. In this review, we summarize and interpret the heterogeneous clinical and laboratory features of all published cases, including ours. Many symptoms and findings are similar to those seen in primary hypothyroidism. However, thyroid-stimulating hormone levels are normal. Free triiodothyronine (T3) levels are in the upper half of normal range or frankly high and free thyroxine (T4) levels are low or in the lower half of normal range. Alterations in free T3 and free T4 may not be remarkable, particularly in adults, possibly contributing to underdiagnosis. In such patients, low reverse T3 levels, normo- or macrocytic anemia or, particularly in children, mildly elevated creatine kinase levels would warrant THRA sequencing. Treatment with L-thyroxine results in improvement of some clinical findings.
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spelling doaj.art-763ebb62c97a4c3e9415f5f36c81ce022023-02-15T16:14:58ZengGalenos YayincilikJCRPE1308-57271308-57352021-03-0113111410.4274/jcrpe.galenos.2020.2019.019013049054The Clinical Spectrum of Resistance to Thyroid Hormone Alpha in Children and Adultsİbrahim Mert Erbaş0Korcan Demir1 Dokuz Eylül University Faculty of Medicine, Department of Pediatric Endocrinology, İzmir, Turkey Dokuz Eylül University Faculty of Medicine, Department of Pediatric Endocrinology, İzmir, Turkey Resistance to thyroid hormone alpha occurs due to pathogenic, heterozygous variants in THRA. The entity was first described in 2012 and to date only a small number of patients with varying severity have been reported. In this review, we summarize and interpret the heterogeneous clinical and laboratory features of all published cases, including ours. Many symptoms and findings are similar to those seen in primary hypothyroidism. However, thyroid-stimulating hormone levels are normal. Free triiodothyronine (T3) levels are in the upper half of normal range or frankly high and free thyroxine (T4) levels are low or in the lower half of normal range. Alterations in free T3 and free T4 may not be remarkable, particularly in adults, possibly contributing to underdiagnosis. In such patients, low reverse T3 levels, normo- or macrocytic anemia or, particularly in children, mildly elevated creatine kinase levels would warrant THRA sequencing. Treatment with L-thyroxine results in improvement of some clinical findings. http://www.jcrpe.org/archives/archive-detail/article-preview/the-clinical-spectrum-of-resistance-to-thyroid-hor/37340 constipationdevelopmental delaygrowth failurecentral hypothyroidismautism spectrum disorderlt4impaired sensitivity to thyroid hormone
spellingShingle İbrahim Mert Erbaş
Korcan Demir
The Clinical Spectrum of Resistance to Thyroid Hormone Alpha in Children and Adults
JCRPE
constipation
developmental delay
growth failure
central hypothyroidism
autism spectrum disorder
lt4
impaired sensitivity to thyroid hormone
title The Clinical Spectrum of Resistance to Thyroid Hormone Alpha in Children and Adults
title_full The Clinical Spectrum of Resistance to Thyroid Hormone Alpha in Children and Adults
title_fullStr The Clinical Spectrum of Resistance to Thyroid Hormone Alpha in Children and Adults
title_full_unstemmed The Clinical Spectrum of Resistance to Thyroid Hormone Alpha in Children and Adults
title_short The Clinical Spectrum of Resistance to Thyroid Hormone Alpha in Children and Adults
title_sort clinical spectrum of resistance to thyroid hormone alpha in children and adults
topic constipation
developmental delay
growth failure
central hypothyroidism
autism spectrum disorder
lt4
impaired sensitivity to thyroid hormone
url http://www.jcrpe.org/archives/archive-detail/article-preview/the-clinical-spectrum-of-resistance-to-thyroid-hor/37340
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