Home   Chapter Home   Jobs   Conferences   Fellowships   Books



Congenital anomalies

Annular pancreas

Reviewer: Deepali Jain, M.D. (see Reviewers page)
Revised: 22 November 2012, last major update August 2012
Copyright: (c) 2001-2012, PathologyOutlines.com, Inc.


● Incidence 1 per 12,000–15,000 live births
● Head of pancreas circles duodenum as a collar and may constrict lumen
● Due to failure of ventral bud to rotate properly
● Associated with Down’s syndrome, esophageal atresia, imperforate anus, congenital heart disease, malrotation of the midgut
● Pancreatic duct is anterior, courses to the right over the duodenum, then posterior and to left behind duodenum, then near common duct
● Complications include pancreatitis, duct obstruction, peptic ulcer
● Has large number of PP cells (of ventral bud origin) in irregular shaped islets
● Portal annular pancreas is rare variant (JOP 2010;11:453)

Clinical images

Development of annular pancreas

Clinical images

Intraoperative images (different cases)

End of Pancreas > Congenital anomalies > Annular pancreas

This information is intended for physicians and related personnel, who understand that medical information is often imperfect, and must be interpreted in the context of a patient's clinical data using reasonable medical judgment. This website should not be used as a substitute for the advice of a licensed physician.

All information on this website is protected by copyright of PathologyOutlines.com, Inc. Information from third parties may also be protected by copyright. Please contact us at [email protected] with any questions (click here for other contact information).