TSH neurosecretory dysfunction (TSH-nd) in Down syndrome (DS): low risk of progression to Hashimoto's thyroiditis

INTRODUCTION: Patients with Down syndrome (DS) often have elevated TSH (hypothalamic origin), which is called TSH neurosecretory dysfunction (TSH-nd). In these cases, there is slight elevation in TSH (5-15 µUI/mL), with normal free T4 and negative thyroid antibodies (AB). OBJECTIVE: To recognize the risk of progression to Hashimoto's thyroiditis (HT). SUBJECTS AND METHODS: We retrospectively analyzed 40 DS patients (mean age = 4.5 years), followed up for 6.8 years. RESULTS: HT was diagnosed in 9/40 patients, three early in monitoring, and six during evolution. In 31/40 patients, TSH-nd diagnosis remained unchanged over the years, with maximum TSH values ranging from 5 to 15 µUI/mL. In this group, free T4 also remained normal and AB were negative. There was a significant TSH reduction (p = 0.017), and normal TSH concentrations (< 5.0 µUI/mL) were observed in 29/31 patients, in at least one moment. No patient had TSH &gt; 15 µUI/mL. CONCLUSION: DS patients with TSH-nd present low risk of progression to HT (10% for females and 6% for males).

Bibliographic Details

Main Authors:	Faria,Claudia Dutra Costantin, Ribeiro,Simone, Kochi,Cristiane, Silva,Aryane Pereira Neves da, Ribeiro,Bruna Natalia Freire, Marçal,Lilian Teixeira, Santos,Felipe Henrique Yyazawa, Eduardo,Calliari Procópio Luis, Monte,Osmar, Longui,Carlos Alberto
Format:	Digital revista
Language:	English
Published:	Sociedade Brasileira de Endocrinologia e Metabologia 2011
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0004-27302011000800018
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