It can refer both to the largest branch of each of these vessels running inside the hepatoduodenal ligament, and to the smaller branches of these vessels inside the liver.
2.
As the portal vein is the most posterior structure in the hepatoduodenal ligament, and the inferior vena cava lies under the posterior wall, the epiploic foramen can be remembered as lying between the two great veins of the abdomen.
3.
The "'lesser omentum "'( "'small omentum "'or "'gastrohepatic omentum "') is the double layer of peritoneum that extends from the liver to the lesser curvature of the stomach ( hepatogastric ligament ) and the first part of the duodenum ( hepatoduodenal ligament ).
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