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Thyroid disorders in chronic hepatitis C virus infection

Alessandro Antonelli1, Clodoveo Ferri, Poupak Fallahi

  • 1Department of Internal Medicine, University of Pisa, Pisa, Italy. a.antonelli@med.unipi.it

Thyroid : Official Journal of the American Thyroid Association
|July 15, 2006
PubMed

Insights

Hepatitis C virus (HCV) infection is linked to a higher prevalence of thyroid autoimmune disorders and hypothyroidism. Careful thyroid monitoring is recommended for patients with HCV infection.

Area of Science:

  • Hepatology
  • Endocrinology
  • Immunology

Background:

  • Thyroid disorders are common in patients with Hepatitis C Virus (HCV) infection.
  • Previous studies have evaluated this association with varying methodologies and control groups.
  • Distinguishing between chronic HCV hepatitis and HCV antibody positivity is crucial for accurate assessment.

Purpose of the Study:

  • To systematically review and synthesize evidence on the prevalence of thyroid disorders in patients with HCV infection.
  • To determine the association between HCV infection and thyroid autoimmune disorders and hypothyroidism.
  • To assess the need for thyroid monitoring in HCV-infected individuals.

Main Methods:

  • Meta-analysis of published controlled studies evaluating thyroid disorders in HCV-positive patients.
  • Comparison of HCV-positive patients (chronic hepatitis or HCVAb-positive) with pooled controls (healthy, HBV-infected, HCVAb-negative).
  • Calculation of odds ratios (OR) and 95% confidence intervals (CI) for thyroid disorders and hypothyroidism.

Main Results:

  • A significant increase in the prevalence of thyroid autoimmune disorders (OR = 1.6) and hypothyroidism (OR = 2.9) was observed in HCV-positive patients compared to controls.
  • The association between HCV infection and thyroid cancer requires further confirmation.
  • Heterogeneity in study designs and control groups was noted.

Conclusions:

  • HCV infection is significantly associated with an increased risk of thyroid autoimmune disorders and hypothyroidism.
  • Routine thyroid monitoring is advisable for patients undergoing follow-up for HCV infection.
  • Further research is needed to confirm the link between HCV and thyroid cancer.

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