Ampulla of Vater
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At the time the article was created Yuranga Weerakkody had no recorded disclosures.View Yuranga Weerakkody's current disclosures
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The ampulla of Vater is a conical structure at the confluence of the common bile duct (CBD) and the main pancreatic duct that protrudes through a natural dehiscence of the duodenal wall at the major duodenal papilla into the medial aspect of the descending duodenum. The entire structure is encased by smooth muscle fibers that compose the sphincter of Oddi 2.
The confluence of the common bile and main pancreatic ducts may occur in three ways 1:
- a common duct (the ampulla of Vater) ~60%: "standard anatomy"
- a “double-barreled” opening at the apex of the papilla ~38%
- separate duodenal openings for the two canals ~2%
History and etymology
Named after Abraham Vater (1684-1751), a German professor of anatomy 5.
The eponymous terms for both the ampulla and the papilla can be replaced with anatomical terms such as hepatopancreatic or biliopancreatic ampulla and major or greater duodenal papilla, respectively 6.
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- 4. Guo ZJ, Chen YF, Zhang YH et-al. CT virtual endoscopy of the ampulla of Vater: preliminary report. Abdom Imaging. 2011;36 (5): 514-9. doi:10.1007/s00261-010-9644-2 - Pubmed citation
- 5. Kanne JP, Rohrmann CA, Lichtenstein JE. Eponyms in radiology of the digestive tract: historical perspectives and imaging appearances. Part 2. Liver, biliary system, pancreas, peritoneum, and systemic disease. Radiographics. 2006;26 (2): 465-80. doi:10.1148/rg.262055130 - Pubmed citation
- 6. Mirilas P, Colborn GL, Skandalakis LJ et-al. Benign anatomical mistakes: "ampulla of Vater" and "papilla of Vater". Am Surg. 2005;71 (3): 269-74. Pubmed citation