Which vessel forms the posterior border of the epiploic foramen?

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Study for the NBME Gross Anatomy High Yield Test. Enhance your learning with flashcards and multiple-choice questions, each detailed with hints and explanations. Prepare effectively for your anatomy exam!

Multiple Choice

Which vessel forms the posterior border of the epiploic foramen?

Explanation:
The epiploic foramen (of Winslow) separates the greater and lesser sacs, and its back boundary is formed by the inferior vena cava as it is covered by peritoneum. The portal vein lies in the anterior boundary within the hepatoduodenal ligament, along with the proper hepatic artery and common bile duct. The aorta and superior mesenteric artery are retroperitoneal structures that do not define these borders. So, the posterior border is the inferior vena cava.

The epiploic foramen (of Winslow) separates the greater and lesser sacs, and its back boundary is formed by the inferior vena cava as it is covered by peritoneum. The portal vein lies in the anterior boundary within the hepatoduodenal ligament, along with the proper hepatic artery and common bile duct. The aorta and superior mesenteric artery are retroperitoneal structures that do not define these borders. So, the posterior border is the inferior vena cava.

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