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Hepatoduodenal ligament

The hepatoduodenal ligament is the thickened free right-sided margin of the lesser omentum. It connects the porta hepatis of the liver to the upper border of the first part of the duodenum. Held within the hepatoduodenal ligament are the bile duct, proper hepatic artery and the hepatic portal vein; collectively known as the portal triad.

Like the lesser omentum, the hepatoduodenal ligament is formed by two layers of peritoneum, the visceral peritoneum and the parietal peritoneum. Between these two layers sits a variable amount of fat and connective tissue, along with blood vessels, lymphatics and nerves, including the anterior vagal trunk from the vagus nerve (CN X).

The hepatoduodenal ligament forms the anterior wall of the omental (epiploic) foramen. This foramen is the communication between the omental bursa and the greater sac (peritoneal cavity proper). The posterior peritoneal layer of the hepatoduodenal ligament continues posteriorly to cover the caudate process of the liver.

Terminology English: Hepatoduodenal ligament
English synonym
: Hepatoduodenal part of lesser omentum
Latin
: Ligamentum hepatoduodenale
Latin
synonym: Pars hepatoduodenalis omentum minoris
Definition The thickened free margin of the lesser omentum, between the liver and the duodenum
Contents Portal triad; bile duct, proper hepatic artery, hepatic portal vein

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