Duodenojejunal flexure
Superior and inferior duodenal fossæ.
Small intestine
Latin	flexura duodenojejunalis
Gray's	subject #248 1170

The duodenojejunal flexure or duodenojejunal junction is the border between the duodenum and the jejunum.

The ascending portion of the duodenum ascends on the left side of the aorta, as far as the level of the upper border of the second lumbar vertebra, where it turns abruptly forward to become the jejunum, forming the duodenojejunal flexure.

It lies in front of the left Psoas major and left renal vessels, and is covered in front, and partly at the sides, by peritoneum continuous with the left portion of the mesentery.

[edit] Additional images

Duodenojejunal fossa.

Front of abdomen, showing surface markings for duodenum, pancreas, and kidneys.

[edit] See also

• Transpyloric plane

[edit] External links

• SUNY Figs 37:06-04 - "The large intestine."
• SUNY Labs 39:07-0105 - "Intestines and Pancreas: The Duodenum"
• SUNY Anatomy Image 8155
• duodenojejunal+flexure at eMedicine Dictionary
• duodenojejunal+junction at eMedicine Dictionary

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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.