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Fig. 3 —65-year-old man with autoimmune pancreatitis. Contrast-enhanced axial CT scan shows infiltrative low-attenuation mass in body of pancreas (arrows) with pancreatic duct dilation and abrupt cutoff. Head of pancreas was not enlarged (not shown), but a biliary stent is in place and bile duct wall is thickened (arrowhead). Wedge-shaped low-attenuation area in right hepatic lobe is thought to be caused by perfusion difference. All three readers correctly diagnosed autoimmune pancreatitis.