title: Portal annular pancreas: the pancreatic duct ring sign on MRCP.
abstract: Portal annular pancreas is a rare pancreatic variant in which the uncinate process of the pancreas extends and fuses to the dorsal surface of the body of the pancreas by surrounding the portal vein. It is asymptomatic, but it can be mistaken for a pancreatic head mass on imaging and could also have serious consequences during pancreatic surgery, if unrecognized. We report this case of a 53-year-old female patient who was diagnosed to have portal annular pancreas on the basis of an unusual course (ring appearance) of the main pancreatic duct on magnetic resonance cholangiopancreatography, not described earlier in the radiology literature.
authors.affiliation: Department of Radiology, Medical College of Wisconsin, 9200 W Wisconsin Ave, Milwaukee, WI, 53226, USA.
authors.forename: Chinar O
authors.initials: CO
authors.lastname: Lath
authors.affiliation: Department of Internal Medicine, Medical College of Wisconsin, 9200 W Wisconsin Ave, Milwaukee, WI, 53226, USA.
authors.forename: Dilpesh S
authors.initials: DS
authors.lastname: Agrawal
authors.affiliation: Department of Radiology, Medical College of Wisconsin, 9200 W Wisconsin Ave, Milwaukee, WI, 53226, USA.
authors.forename: Michael E
authors.initials: ME
authors.lastname: Timins
authors.affiliation: Department of Radiology, Medical College of Wisconsin, 9200 W Wisconsin Ave, Milwaukee, WI, 53226, USA.
authors.forename: Melissa M
authors.initials: MM
authors.lastname: Wein
keywords: MRCP; Pancreatic duct anomalies; Portal annular pancreas