Diagnosis of IgG4-related sclerosing cholangitis

Figure 2 Schematic illustration of comparison of cholangiographic (primary sclerosing cholangitis vs IgG4-related sclerosing cholangitis) findings[28]. The schematic comparison of cholangiographic findings between IgG4-related sclerosing cholangitis (SC) and primary sclerosing cholangitis (PSC). IgG4-related SC displays segmental and long strictures and stricture of the lower common bile duct, whereas PSC displays band-like strictures (1-2 mm), beaded appearance (short and annular stricture alternating with normal or minimally dilated segments), pruned-tree appearance (diminished arbolization of intrahepatic duct and pruning), and diverticulum-like outpouching (outpouchings resembling diverticula, often protruding between adjacent strictures). 1: Band-like stricture; 2: Beaded appearance; 3: Pruned-tree appearance; 4: Dverticulum-like outpouching; 5: Segmental stricture; 6: Long stricture with prestenotic dilation; 7: Stricture of lower common bile duct.