Omental foramen

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Omental foramen
Horizontal disposition of the peritoneum in the upper part of the abdomen.
Winslow EN.svg
Entry to omental bursa (black arrow) by omental foramen (white mark)
Latin foramen omentale
Gray's p.1156
TA A10.1.02.403
FMA FMA:14711
Anatomical terminology

In human anatomy, the omental foramen (epiploic foramen, foramen of Winslow, or uncommonly aditus; Latin: Foramen epiploicum), is the passage of communication, or foramen, between the greater sac (general cavity (of the abdomen)), and the lesser sac.


It has the following borders:

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.

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This article incorporates text from a public domain edition of Gray's Anatomy.