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Journal of Tropical Pediatrics 1993 39(2):107-110; doi:10.1093/tropej/39.2.107
© 1993 by Oxford University Press
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Thyroid Function in Children with ß-Thalassemia Major in North Jordan

AbdelFattah Al-Hader*, Nabil Bashir**, Zuheir Hasan* and Sa'id Khatib*

*Department of Physiology and Biochemistry
**Medical Laboratories of Princess Basma Teaching Hospital and Biochemistry Section, Faculty of Medicine, Jordan University of Science and Technology P.O. Box 3030, Irbid-Jordan

Basal thyroid function was assessed by serum thyroxine, tri-iodothyronine and thyroid-stimulating hormone levels in 90 patients 2–10 years old with ß-thalassaemia major. Based on measured serum ferritin levels, patients were classified into two groups: group (I) which included 63 patients with ferritin concentrations ranging from 300 to 7000 ng/ml (mild iron overload) and group (II) which included 27 patients with ferritin concentrations higher than 7000 ng/ml (severe iron overload). The results of thyroid function in both groups were compared with those of 50 control subjects. In group (I), the mean concentrations of all measured hormones were not significantly different from those of the controls. In group (II), the mean concentrations of thyroxine and tri-iodothyronine decreased by 29 and 35 per cent (P<0.05), respectively, and the mean concentration of thyroid-stimulating hormone showed a 2.6-fold increase (P<0.01) in comparison with those of the controls. The data clearly demonstrate the occurrence of impaired thyroid function and its possible association with iron overload in a considerable proportion of transfusion-dependent ß-thalassaemic patients


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