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Transverse mesocolon

Dr Henry Knipe and Dr Jeremy Jones et al.

The 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 infra-ampullary segment of the descending duodenum, 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 supra- and infra-mesocolic 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 fibres 
  • extraperitoneal fatty tissue
Anatomy: Abdominopelvic

Anatomy: Abdominopelvic

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Article information

rID: 5704
Section: Anatomy
Tag: cases, refs
Synonyms or Alternate Spellings:

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Cases and figures

  • Transverse mesocolon
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  • Mesentery (sagittal)
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