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Question 1

What structures are contained within the hepatoduodenal ligament?

Answer 1

The hepatoduodenal ligament contains the hepatic artery proper, common bile duct, and portal vein.

Question 2

What lies anterior to the first part of the duodenum?

Answer 2

Gather quickly

Anterior to the first part of the duodenum are:

1 The quadrate lobe of the liver
2 The neck of the gallbladder

Question 3

What lies posterior to the first part of the duodenum?

Answer 3

Posterior to the first part of the duodenum are:
1. The lesser sac (first inch only)
2. The gastroduodenal artery
3. The bile duct
4. The portal vein
5. The inferior vena cava

Question 4

What lies superior to the first part of the duodenum?

Answer 4

Superior to the first part of the duodenum is the epiploic foramen.

Question 5

What lies inferior to the first part of the duodenum?

Answer 5

Inferior to the first part of the duodenum is the pancreas.

Question 6

What is the duodenal cap (ampulla)?

Answer 6

The duodenal cap or ampulla is the very first part of the duodenum, which is slightly dilated, intraperitoneal, and about 1 inch long.

Question 7

Why is the duodenal cap a common site for ulcers?

Answer 7

The duodenal cap is the most common site of duodenal ulcers because it is where acidic chyme meets the duodenal mucosa before mixing with the alkaline secretions of the duodenum.

Question 8

What is unique about the mucous membrane of the first inch of the duodenum?

Answer 8

The mucous membrane of the first inch of the duodenum is smooth, unlike the rest of the duodenum, which has circular folds called plicae circulares.

Question 9

What happens to the second inch of the first part of the duodenum?

Answer 9

The second inch of the first part of the duodenum ‘disappears’ behind the peritoneum, becoming retroperitoneal.