Space
Epiploic foramen
Peritoneal connection behind the portal pedicle
High-yield
Portal pedicle anterior, vena cava posterior, caudate lobe superior and proximal duodenum inferior.
Overview
The epiploic foramen allows the greater peritoneal sac to communicate with the lesser sac behind the stomach. Its entrance is tucked behind the hepatoduodenal ligament on the right. The surrounding liver, duodenum and major vessels make its margins useful orientation landmarks.
Reference facts
- Boundaries
- Anterior: hepatoduodenal ligament and portal triad. Posterior: peritoneum over the inferior vena cava. Superior: caudate liver. Inferior: superior duodenum.
- Contents
- A passage within the potential peritoneal cavity, normally containing only the thin fluid layer that lubricates its surfaces.
- Communications
- Connects the greater sac on the right with the vestibule of the lesser sac.
Mnemonic
Picture a portal pedicle in front of a caval wall, with liver above and duodenum below.
Clinical correlation
The foramen's position explains how temporary occlusion of the hepatoduodenal pedicle can reduce hepatic inflow. Bowel can occasionally herniate through this opening and become obstructed; the vascular borders make the region clinically important.
Frequently asked questions
What are the boundaries of the epiploic foramen?
Anterior: hepatoduodenal ligament and portal triad. Posterior: peritoneum over the inferior vena cava. Superior: caudate liver. Inferior: superior duodenum.
What does the epiploic foramen contain?
A passage within the potential peritoneal cavity, normally containing only the thin fluid layer that lubricates its surfaces.
What does the epiploic foramen communicate with?
The epiploic foramen communicates with the connects the greater sac on the right with the vestibule of the lesser sac.