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Major duodenal papilla

Major duodenal papilla
Interior of the descending portion of the duodenum, showing bile papilla
The pancreatic duct
Details
Identifiers
Latinpapilla duodeni major
TA98A05.6.02.015
TA22955
FMA15074
Anatomical terminology

The major duodenal papilla (papilla of Vater) is a rounded projection in the duodenum into which the common bile duct and pancreatic duct drain. The major duodenal papilla is, in most people, the primary mechanism for the secretion of bile and other enzymes that facilitate digestion.

Structure

1. Bile ducts:
      2. Intrahepatic bile ducts
      3. Left and right hepatic ducts
      4. Common hepatic duct
      5. Cystic duct
      6. Common bile duct
      7. Ampulla of Vater
      8. Major duodenal papilla
9. Gallbladder
10–11. Right and left lobes of liver
12. Spleen
13. Esophagus
14. Stomach
15. Pancreas:
      16. Accessory pancreatic duct
      17. Pancreatic duct
18. Small intestine:
      19. Duodenum
      20. Jejunum
21–22. Right and left kidneys
The front border of the liver has been lifted up (brown arrow).[1]

The major duodenal papilla is situated in the second part of the duodenum, 7–10 cm from the pylorus, at the level of the second or third lumbar vertebrae. It is surrounded by the sphincter of Oddi, a circular muscle, and receives a mixture of pancreatic enzymes and bile from the Ampulla of Vater, which drains both the pancreatic duct and biliary system.[2] The junction between the foregut and midgut occurs directly below the major duodenal papilla.[3] : 274  The major duodenal papilla projects less than a centimetre into the lumen of the duodenum.[4] It appears rounded and is often covered by a fold on the uppermost side of the papilla; that is, the side which receives contents from the stomach.[4]

The major duodenal papilla is seen from the duodenum as lying within a mucosal fold. The minor duodenal papilla is situated 2 cm proximal.[2]

Variation

The major duodenal papilla is occasionally found in the junction between the descending and horizontal parts of the duodenum, or in the horizontal part of the duodenum; a case study of 1000 people demonstrated this in 12 and 8% respectively.[4] in the third part of the duodenum, the level of the vertebrae may be L2-3, and in about 10% of people, it may not receive bile. Additionally, in a small number of people, the primary papilla for draining the pancreas may in fact be the accessory pancreatic duct.[2]

Function

Pancreatic enzymes and bile drain into the duodenum from both the pancreatic duct and biliary system.[4] This facilitates the digestion of food; particularly proteins (pancreatic enzymes), and fat-soluble vitamins (bile).

Clinical significance

The minor papilla drains the duct of Santorini, superior in position to the major papilla. In pancreatic divisum, in which the minor papilla drains the bulk of pancreatic secretions and major drains a minority of secretions (opposite of normal), a Santorinicele may develop leading to obstructed secretions/reflux resulting in pancreatitis.

History

The major duodenal papilla was first illustrated by Gottfreid Bidloo in 1685, although is sometimes called the papilla of Vater, after German anatomist Abraham Vater.[2]

See also

This article uses anatomical terminology.

References

Public domain This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

  1. ^ Standring S, Borley NR, eds. (2008). Gray's anatomy : the anatomical basis of clinical practice. Brown JL, Moore LA (40th ed.). London: Churchill Livingstone. pp. 1163, 1177, 1185–6. ISBN 978-0-8089-2371-8.
  2. ^ a b c d Skandalakis, editor in chief John E. (2004). Skandalakis' surgical anatomy : the embryologic and anatomic basis of modern surgery. Athens, Greece: PMP. pp. Chapter 16: Small Intestine, Chapter 21:Pancreas, sections titled "Major duodenal papilla". ISBN 9603990744. {{cite book}}: |first= has generic name (help)
  3. ^ Drake, Richard L.; Vogl, Wayne; Tibbitts, Adam W.M. Mitchell; illustrations by Richard; Richardson, Paul (2005). Gray's anatomy for students. Philadelphia: Elsevier/Churchill Livingstone. ISBN 978-0-8089-2306-0.
  4. ^ a b c d Horiguchi, Shin-ichiro; Kamisawa, Terumi (2010). "Major Duodenal Papilla and Its Normal Anatomy". Digestive Surgery. 27 (2): 90–93. doi:10.1159/000288841. ISSN 1421-9883. PMID 20551649. S2CID 21666445.
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