Thyroid function in children with beta-thalassemia major in north Jordan

Area of Science:

• Endocrinology
• Hematology
• Pediatrics

Background:

• Beta-thalassaemia major is a genetic blood disorder requiring frequent blood transfusions.
• Transfusion therapy can lead to iron overload, a significant complication.
• Iron overload can affect various endocrine organs, including the thyroid.

Purpose of the Study:

• To assess basal thyroid function in children with beta-thalassaemia major.
• To investigate the relationship between iron overload severity and thyroid function.
• To compare thyroid function in patients with different levels of iron overload to healthy controls.

Main Methods:

• Serum levels of thyroxine, tri-iodothyronine, and thyroid-stimulating hormone were measured.
• 90 patients (2-10 years) with beta-thalassaemia major were divided into mild (ferritin 300-7000 ng/ml) and severe (ferritin >7000 ng/ml) iron overload groups.
• Results were compared to 50 age-matched healthy control subjects.

Main Results:

• Patients with mild iron overload showed no significant difference in thyroid hormone levels compared to controls.
• Patients with severe iron overload exhibited significantly decreased thyroxine (29%) and tri-iodothyronine (35%) levels (P < 0.05).
• A significant 2.6-fold increase in thyroid-stimulating hormone was observed in the severe iron overload group (P < 0.01).

Conclusions:

• Transfusion-dependent beta-thalassaemia major patients with severe iron overload frequently experience impaired thyroid function.
• Iron overload is a potential contributing factor to thyroid dysfunction in this population.
• Regular monitoring of thyroid function is crucial for managing beta-thalassaemia major patients with significant iron accumulation.