Congenital anomaly resulting in pancreatic tissue partially or completely encircling descending portion of duodenum
IMAGING
General Features
Radiographic Findings
CT Findings
MR Findings
Angiographic Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Microscopic Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Consider
Image Interpretation Pearls
Selected References
Jovani M et al: Annular pancreas. Clin Gastroenterol Hepatol. 18(7):A26, 2020
Wood CG et al: Pancreatitis in the developmentally anomalous pancreas. Abdom Radiol (NY). 45(5):1316-23, 2020
Piglia EBMD et al: The main radiologic findings in annular pancreas. Radiol Bras. 52(4):275-6, 2019
Türkvatan A et al: Congenital variants and anomalies of the pancreas and pancreatic duct: imaging by magnetic resonance cholangiopancreaticography and multidetector computed tomography. Korean J Radiol. 14(6):905-13, 2013
Jarry J et al: Annular pancreas: a rare cause of acute pancreatitis. JOP. 12(2):155-7, 2011
Lee NK et al: Complications of congenital and developmental abnormalities of the gastrointestinal tract in adolescents and adults: evaluation with multimodality imaging. Radiographics. 30(6):1489-507, 2010
Sandrasegaran K et al: Annular pancreas in adults. AJR Am J Roentgenol. 193(2):455-60, 2009
Mortelé KJ et al: Multimodality imaging of pancreatic and biliary congenital anomalies. Radiographics. 26(3):715-31, 2006
Yamaguchi Y et al: Annular pancreas complicated by carcinoma of the bile duct: diagnosis by MR cholangiopancreatography and endoscopic ultrasonography. Abdom Imaging. 28(3):381-3, 2003
Benya EC: Pancreas and biliary system: imaging of developmental anomalies and diseases unique to children. Radiol Clin North Am. 40(6):1355-62, 2002
McCollum MO et al: Annular pancreas and duodenal stenosis. J Pediatr Surg. 37(12):1776-7, 2002
Shan YS et al: Annular pancreas with obstructive jaundice: beware of underlying neoplasm. Pancreas. 25(3):314-6, 2002
Jayaraman MV et al: CT of the duodenum: an overlooked segment gets its due. Radiographics. 21 Spec No:S147-60, 2001
Kamisawa T et al: A new embryologic hypothesis of annular pancreas. Hepatogastroenterology. 48(37):277-8, 2001
Berrocal T et al: Congenital anomalies of the upper gastrointestinal tract. Radiographics. 19(4):855-72, 1999
Fulcher AS et al: MR pancreatography: a useful tool for evaluating pancreatic disorders. Radiographics. 19(1):5-24; discussion 41-4; quiz 148-9, 1999
Jadvar H et al: Annular pancreas in adults: imaging features in seven patients. Abdom Imaging. 24(2):174-7, 1999
Weiss H et al: Ultrasonography of fetal annular pancreas. Obstet Gynecol. 94(5 Pt 2):852, 1999
Lecesne R et al: MR cholangiopancreatography of annular pancreas. J Comput Assist Tomogr. 22(1):85-6, 1998
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KEY FACTS
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TERMINOLOGY
Definitions
Congenital anomaly resulting in pancreatic tissue partially or completely encircling descending portion of duodenum
IMAGING
General Features
Radiographic Findings
CT Findings
MR Findings
Angiographic Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Microscopic Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
Treatment
DIAGNOSTIC CHECKLIST
Consider
Image Interpretation Pearls
Selected References
Jovani M et al: Annular pancreas. Clin Gastroenterol Hepatol. 18(7):A26, 2020
Wood CG et al: Pancreatitis in the developmentally anomalous pancreas. Abdom Radiol (NY). 45(5):1316-23, 2020
Piglia EBMD et al: The main radiologic findings in annular pancreas. Radiol Bras. 52(4):275-6, 2019
Türkvatan A et al: Congenital variants and anomalies of the pancreas and pancreatic duct: imaging by magnetic resonance cholangiopancreaticography and multidetector computed tomography. Korean J Radiol. 14(6):905-13, 2013
Jarry J et al: Annular pancreas: a rare cause of acute pancreatitis. JOP. 12(2):155-7, 2011
Lee NK et al: Complications of congenital and developmental abnormalities of the gastrointestinal tract in adolescents and adults: evaluation with multimodality imaging. Radiographics. 30(6):1489-507, 2010
Sandrasegaran K et al: Annular pancreas in adults. AJR Am J Roentgenol. 193(2):455-60, 2009
Mortelé KJ et al: Multimodality imaging of pancreatic and biliary congenital anomalies. Radiographics. 26(3):715-31, 2006
Yamaguchi Y et al: Annular pancreas complicated by carcinoma of the bile duct: diagnosis by MR cholangiopancreatography and endoscopic ultrasonography. Abdom Imaging. 28(3):381-3, 2003
Benya EC: Pancreas and biliary system: imaging of developmental anomalies and diseases unique to children. Radiol Clin North Am. 40(6):1355-62, 2002
McCollum MO et al: Annular pancreas and duodenal stenosis. J Pediatr Surg. 37(12):1776-7, 2002
Shan YS et al: Annular pancreas with obstructive jaundice: beware of underlying neoplasm. Pancreas. 25(3):314-6, 2002
Jayaraman MV et al: CT of the duodenum: an overlooked segment gets its due. Radiographics. 21 Spec No:S147-60, 2001
Kamisawa T et al: A new embryologic hypothesis of annular pancreas. Hepatogastroenterology. 48(37):277-8, 2001
Berrocal T et al: Congenital anomalies of the upper gastrointestinal tract. Radiographics. 19(4):855-72, 1999
Fulcher AS et al: MR pancreatography: a useful tool for evaluating pancreatic disorders. Radiographics. 19(1):5-24; discussion 41-4; quiz 148-9, 1999
Jadvar H et al: Annular pancreas in adults: imaging features in seven patients. Abdom Imaging. 24(2):174-7, 1999
Weiss H et al: Ultrasonography of fetal annular pancreas. Obstet Gynecol. 94(5 Pt 2):852, 1999
Lecesne R et al: MR cholangiopancreatography of annular pancreas. J Comput Assist Tomogr. 22(1):85-6, 1998
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