Original Research – Abdomen
Hepatitis activity should be considered a confounder of liver stiffness measured with MR elastography
Article first published online: 3 JUN 2014
© 2014 Wiley Periodicals, Inc.
Journal of Magnetic Resonance Imaging
Volume 41, Issue 5, pages 1203–1208, May 2015
How to Cite
Ichikawa, S., Motosugi, U., Nakazawa, T., Morisaka, H., Sano, K., Ichikawa, T., Enomoto, N., Matsuda, M., Fujii, H. and Onishi, H. (2015), Hepatitis activity should be considered a confounder of liver stiffness measured with MR elastography. J. Magn. Reson. Imaging, 41: 1203–1208. doi: 10.1002/jmri.24666
- Issue published online: 15 APR 2015
- Article first published online: 3 JUN 2014
- Manuscript Accepted: 10 MAY 2014
- Manuscript Received: 8 OCT 2013
- magnetic resonance elastography;
- hepatic fibrosis;
- liver stiffness;
- activity of hepatitis
To evaluate the effect of hepatitis activity on liver stiffness measurements and the role of serum alanine aminotransferase (ALT) in liver fibrosis staging by MR elastography (MRE).
Materials and Methods
We measured liver stiffness (kPa) in 135 patients by MRE and histologically assessed fibrosis and hepatitis activity within 2 months. Stepwise multiple linear regression was performed to determine the maximum adjusted R2 against liver stiffness, after adjusting for nothing (model 1), ALT/upper limit of normal categories (model 2), and hepatitis activity (A grade) by METAVIR (model 3). Logistic regression was used to identify independent factors associated with pathologically proven cirrhosis.
Platelet count and METAVIR F score were strongly associated with liver stiffness. The adjusted R2 value of model 3 (0.7026) was higher than those of models 1 (0.6472) and 2 (0.6564), showing that hepatitis activity affected liver stiffness measurement. High ALT levels (odds ratio, 0.0066; P = 0.0003) as well as MRE (odds ratio, 9.91; P < 0.0001) were independently associated with cirrhosis.
Hepatitis activity may be a confounder of liver stiffness measurement during liver fibrosis staging using MRE. MRE can potentially make an overdiagnosis of liver cirrhosis if the patient has high ALT levels. J. Magn. Reson. Imaging 2015;41:1203–1208. © 2014 Wiley Periodicals, Inc.