Isolated intrapancreatic IgG4-related sclerosing cholangitis

Figure 2 Imaging and pathological findings of Case 1. A: Stenosis of the intrapancreatic bile duct on endoscopic retrograde cholangiopancreatography (ERCP); B, C: No irregular narrowing of the main pancreatic duct on ERCP and magnetic resonance cholangiopancreatography; D: No enlargement of the pancreas on computed tomography (CT); E: Thickening of the extrahepatic bile duct wall on CT (arrowhead); F: Bile duct wall thicking in surgical specimen of bile duct wall (HE × 40); G: Abundant infiltration of lymphocytes and plasma cells in the bile duct wall (HE × 200); H: Abundant infiltration of IgG4-positive plasma cells in the bile duct wall (IgG4 staining × 800); I, J: No findings mimicking AIP in surgical specimen of adjacent pancreatic tissue (I: HE × 2), (J: HE × 400).