Transverse mesocolon
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At the time the article was created Jeremy Jones had no recorded disclosures.
View Jeremy Jones's current disclosuresAt the time the article was last revised Roland Zac White had no recorded disclosures.
View Roland Zac White's current disclosuresThe transverse mesocolon is a broad, meso-fold of peritoneum, which connects the transverse colon to the posterior wall of the abdomen.
It is continuous with the two posterior layers of the greater omentum, which, after separating to surround the transverse colon, join behind it, and are continued backward to the vertebral column, where they diverge in front of the anterior border of the pancreas. This fold contains between its layers the vessels which supply the transverse colon.
The root of the transverse mesocolon extends across the anterior infra-ampullary segment of the descending duodenum (2nd part), the head of the pancreas and continues along the lower edge of the body and tail of the pancreas, and divides the peritoneal cavity into the supracolic and infracolic spaces.
Transverse mesocolon is a derivative of dorsal mesentery in the embryo and contains:
- transverse colon (in the free margin)
- middle colic vessels and their branches
- lymphatics and lymph nodes
- autonomic nerve fibers
- extraperitoneal fatty tissue
References
- 1. Standring S (editor). Gray's Anatomy (39th edition). Churchill Livingstone. (2011) ISBN:0443066841. Read it at Google Books - Find it at Amazon
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- Duodenojejunal flexure
- Inframesocolic space
- Internal hernia due to gastric bypass surgery
- Middle colic artery
- Left inframesocolic space
- Left colic artery
- Anterior right subhepatic space
- Posterior right subhepatic space
- Mesentery
- Anterior pararenal space
- Colon cut-off sign
- Right subhepatic space
- Root of the mesentery
- Abdominal hernia
- Supramesocolic space
- Transverse colon
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