The histopathological examination of hepatobiliary tissues in cats. A: Histopathological analysis using Masson’s trichrome, Sirius red, and Alcian blue staining techniques to analyze the intrahepatic bile duct tissues of cats, including the analysis of the area proportion of positive staining. B: Immunohistochemical staining of intrahepatic bile duct tissues of cats using CK7 and PCNA, analyzing the IOD/Area value for PCNA positive expression. The samples were examined at 200× magnifications. Statistical significance: *p < 0.05; **p < 0.01; ***p < 0.005; ****p < 0.001.