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Thyroid function in beta-thalassemic children receiving hypertransfusions with suboptimal iron-chelating therapy

Somchit Jaruratanasirikul1, Malai Wongcharnchailert, Vichai Laosombat

  • 1Department of Pediatrics, Faculty of Medicine, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand. somchit.j@psu.ac.th

Journal of the Medical Association of Thailand = Chotmaihet Thangphaet
|October 26, 2007
PubMed

Insights

Suboptimal iron chelation in beta-thalassemia patients can lead to compensated primary hypothyroidism. Regular thyroid function monitoring is crucial for early detection and management in these individuals.

Area of Science:

  • Endocrinology
  • Hematology
  • Metabolic Disorders

Background:

  • Transfusion-dependent beta-thalassemia requires iron chelation therapy to prevent iron overload.
  • Suboptimal iron chelation may lead to endocrine complications, including thyroid dysfunction.
  • Thyroid function, specifically free thyroxine (FT4) and thyrotropin (TSH) levels, are key indicators.

Purpose of the Study:

  • To assess the prevalence of thyroid dysfunction in transfusion-dependent beta-thalassemic patients on suboptimal iron-chelating therapy.
  • To investigate the relationship between iron chelation therapy and thyroid function parameters (FT4, TSH).

Main Methods:

  • A cross-sectional study was conducted on 51 transfusion-dependent beta-thalassemic patients.
  • Thyroid function was evaluated by measuring free thyroxine (FT4) and thyrotropin (TSH) concentrations.
  • Patients with abnormal thyroid function were assessed for thyroid antibodies.

Main Results:

  • A prevalence of 17.6% for abnormal thyroid function was observed.
  • Nine patients (17.6%) presented with normal FT4 and elevated TSH, indicating compensated primary hypothyroidism.
  • All patients with abnormal thyroid function had negative thyroid antibodies, ruling out autoimmune causes.

Conclusions:

  • Suboptimal iron-chelating therapy is associated with a significant prevalence of compensated primary hypothyroidism in beta-thalassemia.
  • Thyroid function monitoring is essential in hypertransfused beta-thalassemic patients to detect and manage hypothyroidism.
  • Further follow-up indicated potential progression of TSH elevation in some patients.

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