Impact of liver biopsy size on histological evaluation of chronic viral hepatitis: the smaller the sample, the milder the diseas

Abstract BACKGROUND/AIMS: In chronic viral hepatitis, liver biopsy is performed for assessing disease activity and fibrosis. In this study, we evaluated the impact of the size of liver biopsy on the grading and staging. METHODS: We selected 161 liver biopsies from patients with chronic types B and C hepatitis on the basis of their length (> or =3 cm) and width (1.4 mm). Ishak scoring system was used for grading and staging. The score was blindly repeated reducing the length of the specimen from > or =3 to 1.5 cm and to 1 cm long and width from 1.4 to 1 mm. RESULTS: Reducing the length of the biopsy led to an increase of cases with mild grades: 49.7% in > or =3 cm, 60.2% in 1.5 cm and 86.6% in 1 cm long specimens (P or =3 cm, 68.3% in 1.5 cm and 80.1% in 1 cm long specimens (P