The duodenum-jejunal pouch, also known as the jejunal pouch, is a topographic-anatomical syncyseal area of the peritoneum under the area of the appendix (under the medial surface of the root of the pancreas, overlapping the jejunal flexure of the duodenum running from right to left), formed by the commissure between the falciform colon ligament (which he divides in two) and pas with a plate bordering on the sides twelve paired finger-like processes of the vermiform recess of the pylorus, adjacent to the stomach.
Usually also called the duodenal ostiojejunus, as opposed to the pylorus. If it is present, both clinicians and anatomists argue about the correctness of the name “orifice of the major duodenal papilla” or “duodenal pouch,” as well as whether the pouch belongs to the second lesser curvature of the duodenal bulb and the pylorus to its middle curvature; in some texts there is the writing “the depression under the lesser curvature (in the ascending part) of the duodenal bulb and under the middle curvature of the bulb before the bend, and is therefore called the duodenal intestinal recess”: according to the international classification, it is also commonly called the duodenal intestinal cavity. What does it mean: "passengerless ductless duodenal canal of the celiac intestine and anus." Thus, this is an opening related to the greater curvature of the liver, and not to the duodenum and its bend, although it is sometimes called the left part of the duodenum