Fig. 4. Pathology of IgG4-related SC. A Fig. 4. Pathology of IgG4-related SC. A. Photomicrograph of liver biopsy specimen (original magnification, × 400; hematoxylin and eosin stain) shows fibrous portal widening with concentric fibrosis and moderate degree of mixed inflammatory cells infiltration (arrows) around interlobular bile duct (arrowhead) (curved arrow, arteriole; asterisk, portal venule). B. There are abundant IgG4-positive plasma cells around bile ducts (arrowheads) (original magnification, × 400; IgG4 staining). IgG4 = immunoglobulin G4, SC = sclerosing cholangitis Fig. 4. Pathology of IgG4-related SC. A. Photomicrograph of liver biopsy specimen (original magnification, × 400; hematoxylin and eosin stain) shows fibrous portal widening with concentric fibrosis and moderate degree of mixed inflammatory cells infiltration (arrows) around interlobular bile duct (arrowhead) (curved arrow, arteriole; asterisk, portal venule). B. There are. . . Korean J Radiol. 2016 Jan-Feb;17(1):25-38. http://dx.doi.org/10.3348/kjr.2016.17.1.25