Section 6.19 – Neck and body of upper region
The region of the mesentery between stomach and liver, is the ventral mesogatsrium
It is thin and smooth surfaced, and can be demonstrated by retracting the liver
And stomach in opposite directions
This is the ventral mesogastrium in a different cadaver
The portal pedicle, at the distal extremity of the ventral mesogatsrium
Was previously called the hepatoduodenal ligament
This ignores the relationship between the pedicle and the main body of the mesentery in general
A further space occurs beneath the ventral mesogastrium
This is demonstrated by first retracting the stomach to demonstrate the dorsal mesogastrium
Adhesions may be present between the stomach and mesogastrium and these can be divided
This exposes the space beneath the ventral mesogastrium
Placing a hand through the space opening, the fingers come to lie immediately beneath the
Ventral mesogastrium
This clip demonstrates the ventral mesogatsrium in cadaver 3
It is apparent between the lesser curvature of the stomach and the undersurface of the liver
The greater omentum has been separated from the greater curvature
When the stomach is rotated towards the liver, the dorsal mesogastrium is exposed,
The spleen is positioned at the lateral extremity of the dorsal mesogastrium
And when retracted medially, the posterior surface of the dorsal mesogastrium is apparent
Examination of the medial region of the dorsal mesogastrium
Will demonstrate two mesenteric pedicles
The portal and oesophagogastric pedicles
These coalesce at the lesser curvature of the stomach to complete an arch and continue as the ventral mesogastrium
Towards the liver
This clip demonstrates the pedicles in another cadaver
The dorsal mesogastrium
As well as mesenteric pedicles,
Are apparent
The proximal pedicle is at the oesophagogastric junction,
Where the dorsal mesogastrium coalesces around the OG junction
The distal pedicle and located at approximately the pyloric level
This is the portal pedicle
As previously mentioned
The pedicles merge at the lesser curvature of the stomach to form and arch
The pedicles are located at the extremities of the ventral mesogastrium