Major Duodenal Papilla Flashcards

Identify the major duodenal papilla, its position, ductal openings, mucosal landmarks, sphincter anatomy, and clinical importance.

Card 1 of 26Question

What is the major duodenal papilla?

A small mucosal elevation in the duodenum containing the opening of the terminal biliary and pancreatic drainage pathways.

In This Section

1. What is the major duodenal papilla?

A small mucosal elevation in the duodenum containing the opening of the terminal biliary and pancreatic drainage pathways.

2. What is another anatomical name for the major duodenal papilla?

The papilla of Vater.

3. In which part of the duodenum is the major duodenal papilla located?

The descending, or second, part of the duodenum.

4. On which wall of the descending duodenum is the major duodenal papilla usually found?

The posteromedial wall.

5. What is the approximate vertebral level of the major duodenal papilla?

Near the second lumbar vertebra, although its position varies.

6. Which two ducts usually unite before opening at the major duodenal papilla?

The common bile duct and main pancreatic duct.

7. What is the hepatopancreatic ampulla?

A short common channel usually formed by the union of the common bile duct and main pancreatic duct.

8. What is the principal function of the major duodenal papilla?

To provide an opening for bile and pancreatic secretions to enter the duodenal lumen.

9. Which sphincter complex regulates fluid passage through the major duodenal papilla?

The sphincter of Oddi.

10. What type of muscle forms the sphincter of Oddi?

Smooth muscle.

11. Which component of the sphincter of Oddi surrounds the hepatopancreatic ampulla?

The sphincter ampullae.

12. What anatomical variation occurs when the bile and pancreatic ducts do not form a common ampulla?

The ducts may open separately at the major duodenal papilla.

13. What is the longitudinal fold of the duodenum?

A vertical mucosal ridge associated with the intramural common bile duct, extending superiorly from the major papilla.

14. What is the frenulum of the major duodenal papilla?

A small mucosal fold extending inferiorly from the papilla.

15. Where is the minor duodenal papilla usually located relative to the major papilla?

Approximately 2 cm superior and slightly anterior to the major papilla.

16. Which duct may open at the minor duodenal papilla instead of the major papilla?

The accessory pancreatic duct, also called the duct of Santorini.

17. What type of epithelium covers the luminal surface of the major duodenal papilla?

Predominantly intestinal-type simple columnar epithelium.

18. Which arteries primarily supply the major duodenal papilla?

Branches of the superior and inferior pancreaticoduodenal arteries.

19. Where does venous blood from the major duodenal papilla drain?

Into pancreaticoduodenal veins connected to the portal venous system.

20. Where does lymph from the major duodenal papilla primarily drain?

To pancreaticoduodenal lymph nodes.

21. Which autonomic plexuses contribute to innervation of the major duodenal papillary region?

The celiac and superior mesenteric plexuses through pancreaticoduodenal nerve pathways.

22. Why can a gallstone impacted at the major duodenal papilla cause pancreatitis?

It may obstruct pancreatic juice outflow through the terminal pancreatic duct.

23. How can a tumor at the major duodenal papilla cause obstructive jaundice?

It can block bile entry into the duodenum, causing upstream biliary obstruction.

24. What is an ampullary adenoma?

A glandular epithelial neoplasm arising at or near the ampullary opening, often involving the major duodenal papilla.

25. Why is the major duodenal papilla important during endoscopic retrograde cholangiopancreatography?

It is the principal landmark for cannulating the bile or pancreatic duct.

26. What is an endoscopic sphincterotomy at the major duodenal papilla?

An incision of the terminal ductal sphincter to facilitate biliary or pancreatic drainage.