Thyroid disorders in chronic hepatitis C virus 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.