What is the Duodenojejunal flexure?

The duodenojejunal (DJ) flexure or junction is the anatomical border between the duodenum and the jejunum.

Where is the DJ flexure?

Gross anatomy The DJ flexure is located anterolateral to the aorta at the level of the upper border of the second lumbar vertebra. It makes a sharp turn anteroinferiorly to become the jejunum. The DJ flexure is suspended from the ligament of Treitz, which serves as its surgical landmark and gives it its unique shape.

What is superior duodenal flexure?

Description. The second part, or descending part, of the duodenum begins at the superior duodenal flexure (situated medially to the gallbladder).

Where is the duodenal jejunal junction?

The duodenum continues into the jejunum at the duodenojejunal junction or flexure, which lies to the left of L2 vertebra and is fixed to the retroperitoneum by a suspensory ligament of Treitz. The inferior mesenteric vein (IMV) lies to the left of the duodenojejunal junction.

Where is the Duodenojejunal flexure found?

The duodenojejunal flexure lies in front of the left psoas major muscle, the left renal artery, and the left renal vein. It is covered in front, and partly at the sides, by peritoneum continuous with the left portion of the mesentery.

Where is the major duodenal papilla?

The major duodenal papilla is a slight elevation on the duodenal mucosa when observed through the lumen. It is usually located about 8 cm distal to the pylorus inside the descending limb of the duodenum [1].

Where is duodenum pain located?

What are the symptoms of a duodenal ulcer? Pain in the upper tummy (abdomen) just below the breastbone (sternum) is the common symptom. It usually comes and goes. It may occur most before meals, or when you are hungry.

What is the function of a major duodenal papilla?

The major duodenal papilla is a rounded projection in the duodenum into which the common bile duct and pancreatic duct drain. The major duodenal papilla is, in most people, the primary mechanism for the secretion of bile and other enzymes that facilitate digestion.

What relaxes the sphincter of Oddi?

The sphincter of Oddi is relaxed by the hormone cholecystokinin via vasoactive intestinal peptide.

Is the duodenojejunal flexure part of the jejunum?

This forms the beginning of the jejunum. The duodenojejunal flexure is surrounded by the suspensory muscle of the duodenum. It is retroperitoneal, so is less mobile than the jejunum that comes after it, helping to stabilise the jejunum.

Which is the superior and inferior flexure of the duodenum?

Duodenojejunal flexure. Superior and inferior duodenal fossæ. The duodenojejunal flexure or duodenojejunal junction is the border between the duodenum and the jejunum .

Is the duodenum fixed to the retroperitoneum?

It is fixed to the retroperitoneum. Only after the duodenojejunal flexure does the small intestine become mobile. The duodenum is localized in close vicinity to the pancreas, the caval vein, and the liver. The distinct S-shaped transit into the jejunum is denominated the duodenojejunal flexure.

Where does the jejunum begin in the diaphragm?

The jejunum begins at the duodenojejunal flexure, which is often acutely angulated, as it is suspended by the suspensory ligament of the duodenum (ligament of Treitz), an extension of the right crus of the diaphragm. The jejunum constitutes ~ 40% of the SB and is ~ 2-3 meters long.