Sampling error and intraobserver variation in liver biopsy in patients with chronic HCV infection

Arie Regev, Mariana Berho, Lennox J Jeffers, Clara Milikowski, Enrique G. Molina, Nikolaos T. Pyrsopoulos, Zheng Zhou Feng, K. Rajender Reddy, Eugene R Schiff

Research output: Contribution to journalArticle

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Abstract

OBJECTIVES: Needle liver biopsy has been shown to have a high rate of sampling error in patients with diffuse parenchymal liver diseases. In these cases, the sample of liver tissue does not reflect the true degree of inflammation, fibrosis, or cirrhosis, despite an adequate sample size. The aim of this study was to determine the rate and extent of sampling error in patients with chronic hepatitis C virus infection, and to assess the intraobserver variation with the commonly used scoring system proposed by Scheuer and modified by Batts and Ludwig. METHODS: A total of 124 patients with chronic hepatitis C virus infection underwent simultaneous laparoscopy-guided biopsies of the right and left hepatic lobes. Formalin-fixed paraffin-embedded sections were stained with hematoxylin and eosin and with trichrome. The slides were blindly coded and randomly divided among two hepatopathologists. Inflammation and fibrosis were scored according to the standard grading (inflammation) and staging (fibrosis) method based on the modified Scheuer system. Following the interpretation, the slides were uncoded to compare the results of the right and left lobes. Fifty of the samples were blindly resubmitted to each of the pathologists to determine the intraobserver variation. RESULTS: Thirty of 124 patients (24.2%) had a difference of at least one grade, and 41 of 124 patients (33.1%) had a difference of at least one stage between the right and left lobes. In 18 patients (14.5%), interpretation of cirrhosis was given in one lobe, whereas stage 3 fibrosis was given in the other. A difference of two stages or two grades was found in only three (2.4%) and two (1.6%) patients, respectively. Of the 50 samples that were examined twice, the grading by each pathologist on the second examination differed from the first examination in 0% and 4%, and the staging differed in 6% and 10%, respectively. All observed variations were of one grade or one stage. CONCLUSIONS: Liver biopsy samples taken from the right and left hepatic lobes differed in histological grading and staging in a large proportion of chronic hepatitis C virus patients; however, differences of more than one stage or grade were uncommon. A sampling error may have led to underdiagnosis of cirrhosis in 14.5% of the patients. These differences could not be attributed to intraobserver variation, which appeared to be low.

Original languageEnglish
Pages (from-to)2614-2618
Number of pages5
JournalAmerican Journal of Gastroenterology
Volume97
Issue number10
DOIs
StatePublished - Oct 1 2002

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Observer Variation
Selection Bias
Biopsy
Fibrosis
Liver
Infection
Chronic Hepatitis C
Hepacivirus
Virus Diseases
Inflammation
Needle Biopsy
Hematoxylin
Eosine Yellowish-(YS)
Paraffin
Sample Size
Laparoscopy
Formaldehyde
Liver Diseases

ASJC Scopus subject areas

  • Gastroenterology

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Sampling error and intraobserver variation in liver biopsy in patients with chronic HCV infection. / Regev, Arie; Berho, Mariana; Jeffers, Lennox J; Milikowski, Clara; Molina, Enrique G.; Pyrsopoulos, Nikolaos T.; Feng, Zheng Zhou; Reddy, K. Rajender; Schiff, Eugene R.

In: American Journal of Gastroenterology, Vol. 97, No. 10, 01.10.2002, p. 2614-2618.

Research output: Contribution to journalArticle

Regev, Arie ; Berho, Mariana ; Jeffers, Lennox J ; Milikowski, Clara ; Molina, Enrique G. ; Pyrsopoulos, Nikolaos T. ; Feng, Zheng Zhou ; Reddy, K. Rajender ; Schiff, Eugene R. / Sampling error and intraobserver variation in liver biopsy in patients with chronic HCV infection. In: American Journal of Gastroenterology. 2002 ; Vol. 97, No. 10. pp. 2614-2618.
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title = "Sampling error and intraobserver variation in liver biopsy in patients with chronic HCV infection",
abstract = "OBJECTIVES: Needle liver biopsy has been shown to have a high rate of sampling error in patients with diffuse parenchymal liver diseases. In these cases, the sample of liver tissue does not reflect the true degree of inflammation, fibrosis, or cirrhosis, despite an adequate sample size. The aim of this study was to determine the rate and extent of sampling error in patients with chronic hepatitis C virus infection, and to assess the intraobserver variation with the commonly used scoring system proposed by Scheuer and modified by Batts and Ludwig. METHODS: A total of 124 patients with chronic hepatitis C virus infection underwent simultaneous laparoscopy-guided biopsies of the right and left hepatic lobes. Formalin-fixed paraffin-embedded sections were stained with hematoxylin and eosin and with trichrome. The slides were blindly coded and randomly divided among two hepatopathologists. Inflammation and fibrosis were scored according to the standard grading (inflammation) and staging (fibrosis) method based on the modified Scheuer system. Following the interpretation, the slides were uncoded to compare the results of the right and left lobes. Fifty of the samples were blindly resubmitted to each of the pathologists to determine the intraobserver variation. RESULTS: Thirty of 124 patients (24.2{\%}) had a difference of at least one grade, and 41 of 124 patients (33.1{\%}) had a difference of at least one stage between the right and left lobes. In 18 patients (14.5{\%}), interpretation of cirrhosis was given in one lobe, whereas stage 3 fibrosis was given in the other. A difference of two stages or two grades was found in only three (2.4{\%}) and two (1.6{\%}) patients, respectively. Of the 50 samples that were examined twice, the grading by each pathologist on the second examination differed from the first examination in 0{\%} and 4{\%}, and the staging differed in 6{\%} and 10{\%}, respectively. All observed variations were of one grade or one stage. CONCLUSIONS: Liver biopsy samples taken from the right and left hepatic lobes differed in histological grading and staging in a large proportion of chronic hepatitis C virus patients; however, differences of more than one stage or grade were uncommon. A sampling error may have led to underdiagnosis of cirrhosis in 14.5{\%} of the patients. These differences could not be attributed to intraobserver variation, which appeared to be low.",
author = "Arie Regev and Mariana Berho and Jeffers, {Lennox J} and Clara Milikowski and Molina, {Enrique G.} and Pyrsopoulos, {Nikolaos T.} and Feng, {Zheng Zhou} and Reddy, {K. Rajender} and Schiff, {Eugene R}",
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AU - Regev, Arie

AU - Berho, Mariana

AU - Jeffers, Lennox J

AU - Milikowski, Clara

AU - Molina, Enrique G.

AU - Pyrsopoulos, Nikolaos T.

AU - Feng, Zheng Zhou

AU - Reddy, K. Rajender

AU - Schiff, Eugene R

PY - 2002/10/1

Y1 - 2002/10/1

N2 - OBJECTIVES: Needle liver biopsy has been shown to have a high rate of sampling error in patients with diffuse parenchymal liver diseases. In these cases, the sample of liver tissue does not reflect the true degree of inflammation, fibrosis, or cirrhosis, despite an adequate sample size. The aim of this study was to determine the rate and extent of sampling error in patients with chronic hepatitis C virus infection, and to assess the intraobserver variation with the commonly used scoring system proposed by Scheuer and modified by Batts and Ludwig. METHODS: A total of 124 patients with chronic hepatitis C virus infection underwent simultaneous laparoscopy-guided biopsies of the right and left hepatic lobes. Formalin-fixed paraffin-embedded sections were stained with hematoxylin and eosin and with trichrome. The slides were blindly coded and randomly divided among two hepatopathologists. Inflammation and fibrosis were scored according to the standard grading (inflammation) and staging (fibrosis) method based on the modified Scheuer system. Following the interpretation, the slides were uncoded to compare the results of the right and left lobes. Fifty of the samples were blindly resubmitted to each of the pathologists to determine the intraobserver variation. RESULTS: Thirty of 124 patients (24.2%) had a difference of at least one grade, and 41 of 124 patients (33.1%) had a difference of at least one stage between the right and left lobes. In 18 patients (14.5%), interpretation of cirrhosis was given in one lobe, whereas stage 3 fibrosis was given in the other. A difference of two stages or two grades was found in only three (2.4%) and two (1.6%) patients, respectively. Of the 50 samples that were examined twice, the grading by each pathologist on the second examination differed from the first examination in 0% and 4%, and the staging differed in 6% and 10%, respectively. All observed variations were of one grade or one stage. CONCLUSIONS: Liver biopsy samples taken from the right and left hepatic lobes differed in histological grading and staging in a large proportion of chronic hepatitis C virus patients; however, differences of more than one stage or grade were uncommon. A sampling error may have led to underdiagnosis of cirrhosis in 14.5% of the patients. These differences could not be attributed to intraobserver variation, which appeared to be low.

AB - OBJECTIVES: Needle liver biopsy has been shown to have a high rate of sampling error in patients with diffuse parenchymal liver diseases. In these cases, the sample of liver tissue does not reflect the true degree of inflammation, fibrosis, or cirrhosis, despite an adequate sample size. The aim of this study was to determine the rate and extent of sampling error in patients with chronic hepatitis C virus infection, and to assess the intraobserver variation with the commonly used scoring system proposed by Scheuer and modified by Batts and Ludwig. METHODS: A total of 124 patients with chronic hepatitis C virus infection underwent simultaneous laparoscopy-guided biopsies of the right and left hepatic lobes. Formalin-fixed paraffin-embedded sections were stained with hematoxylin and eosin and with trichrome. The slides were blindly coded and randomly divided among two hepatopathologists. Inflammation and fibrosis were scored according to the standard grading (inflammation) and staging (fibrosis) method based on the modified Scheuer system. Following the interpretation, the slides were uncoded to compare the results of the right and left lobes. Fifty of the samples were blindly resubmitted to each of the pathologists to determine the intraobserver variation. RESULTS: Thirty of 124 patients (24.2%) had a difference of at least one grade, and 41 of 124 patients (33.1%) had a difference of at least one stage between the right and left lobes. In 18 patients (14.5%), interpretation of cirrhosis was given in one lobe, whereas stage 3 fibrosis was given in the other. A difference of two stages or two grades was found in only three (2.4%) and two (1.6%) patients, respectively. Of the 50 samples that were examined twice, the grading by each pathologist on the second examination differed from the first examination in 0% and 4%, and the staging differed in 6% and 10%, respectively. All observed variations were of one grade or one stage. CONCLUSIONS: Liver biopsy samples taken from the right and left hepatic lobes differed in histological grading and staging in a large proportion of chronic hepatitis C virus patients; however, differences of more than one stage or grade were uncommon. A sampling error may have led to underdiagnosis of cirrhosis in 14.5% of the patients. These differences could not be attributed to intraobserver variation, which appeared to be low.

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