MRCP images were performed prior to ERCP at the request of the GI service. There is dilation of the intrahepatic ducts, gallbladder, cystic duct, and common bile duct. There are no findings of obstructive stone. The distal CBD tapers abruptly near the papilla, and is obstructed due to the duodenal mass (either due to invasion or mass effect). The duodenal mass is again seen and better characterized on CT, with intermediate T2 signal.