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Multimodality Imaging of Pancreatic and Biliary Congenital Anomalies¹

¹ From the Department of Radiology, Division of Abdominal Imaging and Intervention (K.J.M., J.L.S.), and the Department of Radiology, 3D and Image Processing Center (T.C.R.), Brigham and Women’s Hospital, Harvard Medical School, 75 Francis St, Boston, MA 02115; and the Department of Radiology, Clinical Science Center, University of Wisconsin, Madison, Wis (A.J.T.). Presented as an education exhibit at the 2004 RSNA Annual Meeting. Received August 18, 2005; revision requested October 5 and received January 11, 2006; accepted January 11. All authors have no financial relationships to disclose. Address correspondence to K.J.M. (e-mail: kmortele{at}partners.org).

A wide spectrum of anomalies of the pancreas, the pancreatic ductal system, and the biliary tree are commonly encountered at radiologic evaluation. These anomalies may simulate various neoplastic, inflammatory, and posttraumatic conditions and should be part of the differential diagnosis for a variety of abnormalities found at diagnostic imaging. Anatomic variants, developmental anomalies (eg, pancreas divisum, annular pancreas, ectopic pancreas, pancreatic agenesis and hypoplasia), and congenital diseases (congenital pancreatic cysts, von Hippel–Lindau disease, choledochal cysts), in addition to potential imaging pitfalls (uneven distribution of fat, "pseudomasses"), can all pose a diagnostic challenge for the radiologist. Familiarity with these anomalies, the imaging techniques available for their study, and their variable imaging manifestations is necessary for differentiating them from other biliary and pancreatic conditions. A basic understanding of the embryologic development and normal anatomy of the pancreas and biliary tree is also essential for identifying these anomalies.

© RSNA, 2006

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