Figure 11c. Acute pancreatitis with pancreatic fluid extending through the portal venous system. (a, b) Postcontrast CT scans show a pseudocyst (* in b) in the uncinate process of the pancreas. A low-attenuation area within the portal venous system is also identified (arrows in a). (c) Endoscopic retrograde cholangiopancreatogram shows contrast medium filling the biliary tract and entering the portal venous system through the pseudocyst (*). C = common bile duct, PV = portal vein, SPV = splenic vein. (d) MR cholangiopancreatogram shows high signal intensity of the portal venous system in contiguity with the pseudocyst (*). C = common bile duct, MPD = main pancreatic duct, PV = portal vein, SPV = splenic vein.