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©2013 UpToDate ® Print Email Annular pancreas Endoscopic retrograde cholangiopancreatography (ERCP) shows a branch of the pancreatic duct surrounding the descending duodenum. A short ventral pancreas is found. Reproduced with permission from: ERCP in Paediatric Practice: Diagnosis and Treatment, Isis Medical Media LTD, Oxford University Press, UK 1997. Copyright ©1997 Oxford University Press.