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Chronic hepatitis C in children: a clinical and immunohistochemical comparative study with adult patients
C García-Monzón1, P Jara, M Fernández-Bermejo
1Liver Unit, Hospital de la Princesa, Madrid, Spain. garciamonzon@hotmail.com
Insights
Hepatitis C virus (HCV) infection in children, often from perinatal transfusions, presents with lower viral load and milder liver disease compared to adults. This study highlights distinct characteristics of pediatric chronic hepatitis C (CHC).
Area of Science:
- Hepatology
- Virology
- Immunology
Background:
- Limited data exists on hepatitis C virus (HCV) characteristics in pediatric populations.
- Understanding differences between pediatric and adult chronic hepatitis C (CHC) is crucial for effective management.
Purpose of the Study:
- To compare epidemiological, virological, histological, and immunological features of CHC in children versus adults.
- To identify specific traits of HCV infection in pediatric patients.
Main Methods:
- Serum analysis for alanine transaminase (ALT) levels, HCV genotyping, and viral load in 24 children and 32 adults.
- Histological assessment and immunohistochemical analysis of liver tissue.
Main Results:
- Perinatal transfusion was the primary HCV source in children (62%).
- Children exhibited lower ALT levels and viral loads than adults, with similar infection duration.
- Milder histological liver disease and weaker intrahepatic immune responses were significantly more common in children.
Conclusions:
- Perinatal blood transfusion is a key transmission route for pediatric HCV infection.
- Pediatric CHC is characterized by lower ALT, lower viral load, and less severe liver histology and immunology compared to adults.
Abstract:
Limited information is available regarding the characteristics of the hepatitis C virus (HCV) infection in children. We compared the epidemiological background along with the virological and histological features as well as the intrahepatic immunologic phenotype of both children and adults with chronic hepatitis C (CHC). Serum samples of 24 pediatric and 32 adult patients were drawn for alanine transaminase (ALT) levels, HCV-typing, and viral load. The histological diagnosis and a semiquantitative immunohistochemical assessment were performed in all patients. The majority of children (62%) had been transfused and the mean duration of viral infection in these cases was 11 +/- 4 years, being similar in adults (11 +/- 9 years, not significant). Although genotype distribution was similar, viral load was lower in children than in adults. The mildest histological forms of chronic hepatitis along with a weak intrahepatic immunological phenotype were significantly more frequent among children than adult patients. In conclusion, in children with CHC, perinatal blood transfusion was the most frequent source of viral infection and the liver disease was characterized by both low ALT level and viral load, as well as the mildest histological and immunohistochemical forms of chronic hepatitis.