The lesser sac , also known as the omental bursa , is the cavity in the abdomen that is formed by the lesser and greater omentum . Usually found in mammals, it is connected with the greater sac via the omental foramen (previously known as the Foramen of Winslow ). In mammals, it is not uncommon for the lesser sac to contain considerable amounts of fat.
Retropubic space is the extraperitoneal space between the pubic symphysis and urinary bladder . The retropubic space is preperitoneal space , behind the transversalis fascia and in front of peritoneum.
This review is based on a presentation given by Angela Levy and adapted for the Radiology Assistant by Robin Smithuis. We will discuss the normal anatomy and physiology of the peritoneum and peritoneal cavity. In part II we will discuss peritoneal tumors. The illustrations are by Heike Blum Images can be enlarged by clicking on them.
The author prefers an MTL approach (see the video below), for several reasons. It places the inferior mesenteric artery (IMA) immediately into view, as well as two avascular mesenteric windows, which are always present immediately cephalad and caudal to the IMA. In addition, it requires only one retracting instrument, which facilitates single-site surgery, and it does not require looking "over" the colon from the patient’s right side, thereby allowing less vigorous retraction of the colon and creating less of an opportunity for injury to the specimen.
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