“…Recently, serum Mac‐2 binding protein glycosylation isomer (M2BPGi) was reported as a novel fibrosis marker of chronic liver disease, including hepatitis C virus, hepatitis B virus, non‐alcoholic steatohepatitis, and primary biliary cirrhosis . We have also reported the usefulness of M2BPGi in patients with biliary atresia, suggesting M2BPGi as a less invasive, easy‐to‐use, and high‐quality biomarker with a novel ability to predict the progression of liver fibrosis . In addition, previous studies have demonstrated that M2BPGi not only predicts the status of fibrosis but also has the functional ability to predict the activation of viral hepatitis, recurrence of carcinogenesis, and the risk of post‐hepatectomy liver failure, although the mechanisms underlying this predictive ability are unknown …”