Abstract: Objective The purpose of this study was to summarize serum alanine aminotransferase (ALT)/ alkaline phosphatase (ALP) ratio changes and liver histopathological features of patients with drug-induced liver injury (DILI) acute hepatocellular type.Methods 43 patients with DILI were admitted to Beijing You'an Hospital between August 2018 and August 2019 and diagnosed at presentation as acute hepatocellular type by serum ALT, ALP and R. All patients underwent liver biopsies at the end of two week liver-protecting treatment.Results At the time of liver biopsies, serum ALT, aspartate aminotransferase (AST), total serum bilirubin (TBIL), ALP, γ - glutamyltranspeptidase (GGT) and total bile acid (TBA) levels in 43 clinically diagnosed at admission as hepatocellular type of DILI decreased greatly, and the R also decreased from 19.6±13.6 to 3.29±3.26 (P<0.05); the histopathological examination showed acute inflammation in 21 and inflammatory cholestasis in 22 cases; there were no significant differences as respect to serum ALT, AST, TBIL, ALP and GGT levels at presentation between the two groups(P>0.05), while the R in patients with acute inflammation was much lower than in patients with inflammatory cholestasis(13.8±6.2 vs. 25.5±16.5, P=0.004), and serum TBA level was also significantly lower than in patients with inflammatory cholestasis (61.0±60.8 μmol/L vs. 115.3±80.9μmol/L, P=0.017); only 9 patients accorded with hepatocellular injury at liver biopsies out of the 43 patients with DILI; the area under ROC was 0.708 in diagnosing intrahepatic cholestasis, when the R equalto 14.9 was set as the cut-off-value.Conclusion The clinical type classification of drug-induced liver injury presents as a dynamic changes, and the increased R might help diagnose intrahepatic cholestasis.

Key words: Drug-induced liver injury, Clinical type, Dynamic