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Iranian Journal of Pediatrics
Tehran University of Medical Sciences Press
ISSN: 1018-4406
EISSN: 2008-2150
Vol. 22, No. 1, 2012, pp. 107-112
Bioline Code: pe12018
Full paper language: English
Document type: Research Article
Document available free of charge

Iranian Journal of Pediatrics, Vol. 22, No. 1, 2012, pp. 107-112

 en Evaluation of Congenital Hypothyroidism in Fars Province, Iran
Karamizadeh, Zohreh; Saneifard, Hedyeh; Amirhakimi, Golmhossein; Karamifar, Hamdollah & Alavi, Mehrsadat

Abstract

Objective: In Iran thyroid-stimulating hormone (TSH) based neonatal screening program is included in health care services from 2005 for detection of patients with primary congenital hypothyroidism (CH). This study was performed for a critical evaluation of the screening program primary congenital hypothyroidism in Fars province, Iran.
Methods: From November 2006 to September 2007, TSH serum concentrations of 63031 newborns, 3 to 5 days old born in Fars province, were measured by heel prick. The newborns with TSH ≥5mIU/L were recalled for measurement of serumT4 and TSH in venous blood samples
Findings: Of 127 recalled subjects, 43 were confirmed to be hypothyroid, showing a prevalence of 1:1465 with F:M ratio of 1.05:1. The most common clinical and radiological findings were prolonged jaundice (73%), large anterior fontanel (56%), wide posterior fontanel (55%), absence of distal femoral epiphysis (20%), and umbilical hernia (11%). Scintigraphy of the thyroid with 99mTC revealed eutopia (67.4%), hypoplasia (23.3%), agenesis (4.7%) and ectopia (2.3%).
Conclusion: It is concluded that a cut off value of TSH≥5mIU/L overestimates recalling the number of patients with CH. The most common cause of congenital hypothyroidism is not dysgenesis of the gland and perhaps dyshormonogenesis in Iran is more common than what is reported in other countries.

Keywords
Congenital Hypothyroidism; Thyroxin; Thyroglobolin; Thyroid Dysgenesis; Fars province

 
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