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Thyroid evaluation of children and adolescents with Williams syndrome in Zhejiang Province

  • Wei-Jun Chen , Chai Ji , Dan Yao and Zheng-Yan Zhao EMAIL logo
Published/Copyright: November 11, 2017

Abstract

Background:

The objective of the study was to describe the prevalence of abnormal thyroid function and volume in children and adolescents with Williams syndrome (WS) in Zhejiang Province, China.

Methods:

Thyroid function, including thyroid-stimulating hormone (TSH), free triiodothyronine (fT3), free thyroxine (fT4), and thyroid antibodies (thyroid peroxidase and thyroglobulin) were measured in 83 patients with WS, aged 0.2–16.5 years. Twenty-three patients were followed for an average of 1.7 years (0.4–4.1), and multiple TSH determinations were considered. Thyroid ultrasonography was performed on 49 patients.

Results:

One patient was diagnosed with overt hypothyroidism, and 23 patients (27%) had subclinical hypothyroidism (SH). Thyroid antibodies were absent in all patients. In five age groups (0–1 years, 1–3 years, 3–6 years, 6–9 years, 9–18 years), the prevalence of patients with subclinical hypothyroidism was 25%, 28.5%, 44.4%, 16.7% and 4.7%, respectively. Through ultrasound examination, 21 patients (42%) were observed to have thyroid hypoplasia (TH), and there were no cases of thyroid haemiagenesis. The incidence rate of TH increased with age, rising from 20% in the youngest group to 66% in the oldest.

Conclusions:

SH and TH is common in children and adolescents with WS. Yearly evaluation of thyroid must be performed in all patients in this population, regardless of the result of the neonatal screening. Age under 6 years and existing thyroid abnormalities are risk factors for developing SH, and a shorter follow-up interval is needed for screening in these individuals, SH is often self-limiting, and clinicians should be alert to overt hypothyroidism.


Corresponding author: Zheng-Yan Zhao, MM, Department of Child Health Care, Children’s Hospital of Zhejiang University School of Medicine, 57# Zhugan Road, Hangzhou, Zhejiang Province, P.R. China, Phone: 0086-571-87064482, Fax: 0086-571-87033296

Acknowledgments

We would like to thank all the patients and their families for their consent and support, as well as the physicians who have contributed with the clinical information of their patients.

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: This work was supported by grants from the Science & Technology Bureau of Zhejiang Province (2015C33127).

  3. Employment or leadership: None declared.

  4. Honorarium: None declared.

  5. Competing interests: The funding organisation(s) played no role in the study design; in the collection, analysis, and interpretation of data; in the writing of the report; or in the decision to submit the report for publication.

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Received: 2017-4-11
Accepted: 2017-8-12
Published Online: 2017-11-11
Published in Print: 2017-11-27

©2017 Walter de Gruyter GmbH, Berlin/Boston

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