Focal autoimmune pancreatitis

Axial contrast-enhanced CT scan images (A, B) demonstrating focal AIP with hypoenhancing mass-like area in the head of the pancreas (image A, arrow). Sclerosing cholangitis with thickening and enhancement of CBD wall (image B, thick black arrow), and central intrahepatic bile duct strictures with moderate intrahepatic biliary dilation on MRCP (C).