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Published on: February 19, 2019
Histopathological evaluation of liver biopsy specimens in children with chronic hepatitis B
Iwona Mozer-Lisewska1, Wojciech Słuzewski, Anna Mania
1Department of Infectious Diseases and Child Neurology, III Chair of Pediatrics, University of Medical Sciences, ul. Szpitalna 27/33, 60-572 Poznań, Poland.
Insights
Histopathological evaluation in children with chronic hepatitis B (CHB) shows varying liver injury severity. Necroinflammatory activity correlates with fibrosis, and viral antigen expression confirms disease etiology.
Area of Science:
- Hepatology
- Pediatric Gastroenterology
- Virology
Background:
- Histopathological liver evaluation is crucial for diagnosing liver diseases.
- Chronic hepatitis B (CHB) in children requires careful assessment of disease progression.
Purpose of the Study:
- To evaluate liver inflammatory activity and fibrosis in pediatric CHB patients.
- To correlate these histological findings with viral antigen expression (HBsAg, HBcAg) before treatment.
Main Methods:
- Analysis of 190 liver biopsies from children with CHB using the modified Knodell system.
- Immunomorphological analysis for HBsAg and HBcAg in 125 biopsies.
Main Results:
- Mild to moderate necroinflammatory activity and mild to advanced fibrosis were observed.
- A significant correlation was found between necroinflammation grading and fibrosis staging.
- HBsAg was detected in 62 biopsies; HBcAg was found in 108 biopsies, with partial correlation to inflammatory infiltrate.
Conclusions:
- Liver injury in pediatric CHB is variable, with correlated necroinflammation and fibrosis.
- Viral antigen expression confirms CHB etiology but shows limited correlation with specific histological changes.
Introduction:
Histopathological evaluation of the liver remains important diagnostic tool.
Objective:
The aim of this study was to assess inflammatory activity, fibrosis and their correlation to the expression of viral antigens in the liver of children with chronic hepatitis B (CHB) before antiviral treatment.
Material And Methods:
The study included 190 liver biopsies of children aged 1.5-18 (mean 7.46+/-4.05 years) with CHB. The histopathological examination was based on the modified Knodell system. Additionally, immunomorphological analysis was performed in 125 specimens to detect HBsAg and HBcAg.
Results:
Necroinflammatory activity was scored for mild in 109 children and moderate in 49. Fibrosis was scored for S1 in 90, S2 in 58 and S3-S4 in seven cases. Positive correlation between grading and staging was observed (chi(2)=77.65, p=0.000002). HBsAg was detected in 62 specimens, while HBcAg was found in the nuclei of 108 samples with cytoplasmic expression in 35-28% cases. No correlation of HBsAg expression to histopathological lesions was established whereas partial correlation of HBcAg expression with inflammatory infiltrate was confirmed.
Conclusions:
Progression of liver injury in children with CHB varies in severity. Necroinflammatory activity correlates with fibrosis. Expression of viral antigens is independent of histological changes, however confirms the etiology of liver disease.
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