In this study, the pathological manifestations of antibody-negative PBC were similar to those of antibody-positive PBC, but the lymphocyte aggregation in antibody-negative PBC was more severe than that in antibody-positive PBC, while the degree of bile duct injury and CK7-positive hepatocytes were milder than that in antibody-positive PBC, suggesting that the overall pathological changes of antibody-negative PBC were slightly milder than those of antibody-positive PBC. Here, KRT7 is linked to primary biliary cholangitis.