Duodenojejunal flexure

Duodenojejunal flexure
Superior and inferior duodenal fossæ.
Small intestine
Details
Identifiers
Latin	flexura duodenojejunalis
Dorlands /Elsevier	f_09/12368320
TA	A05.6.02.009
FMA	15957
Anatomical terminology []

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. The duodenojejunal flexure is surrounded by the suspensory muscle of the duodenum.

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.

The ligament of Treitz, a peritoneal fold, from the right crus of diaphragm, is an identification point for the duodenojejunal flexure at operation.

Duodenojejunal fossa.

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

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)