lesser omentum


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to lesser omentum: Lesser sac

omentum

 [o-men´tum] (L.)
a fold of peritoneum extending from the stomach to adjacent abdominal organs. adj., adj omen´tal.
gastrocolic omentum greater omentum.
gastrohepatic omentum lesser omentum.
greater omentum a peritoneal fold attached to the anterior surface of the transverse colon.
lesser omentum a peritoneal fold joining the lesser curvature of the stomach and the first part of the duodenum to the porta hepatis.
omentum ma´jus greater omentum.
omentum mi´nus lesser omentum.

less·er o·men·tum

[TA]
a thin, double-layer peritoneal fold formed by the ventral mesentery of the stomach (ventral mesogastrium) passing from the lesser curvature of the stomach and upper border to the proximal duodenum (2 cm distal to the pylorus) to the liver (margins of the porta hepatis and into the depth of the fissure of the ductus venosus); major subcomponents include the hepatogastric ligament (main sheetlike portion) and the hepatoduodenal ligament (thickened free right border, which encloses the hepatic artery, portal vein, and common bile duct.

lesser omentum

n.
A fold of the peritoneum joining parts of the stomach and duodenum to the liver.

lesser omentum

Etymology: AS, losian, to lose; L, omentum, entrails
a membranous extension of the peritoneum from the peritoneal layers covering the ventral and the dorsal surfaces of the stomach and the first part of the duodenum. The lesser omentum extends from the portal fissure of the liver to the diaphragm, where the layers separate to enclose the end of the esophagus. It also forms two ligaments, one associated with the liver, the hepatogastric ligament, and the other, the hepatoduodenal ligament, with the duodenum. Also called gastrohepatic omentum, small omentum.

less·er o·men·tum

(les'ĕr ō-men'tŭm) [TA]
A peritoneal fold passing from the margins of the porta hepatis and the bottom of the fissure of the ductus venosus to the lesser curvature of the stomach and to the upper border of the duodenum for a distance of about 2 cm beyond the gastroduodenal pylorus.

omentum

pl. omenta [L.] a fold of peritoneum extending from the stomach to adjacent abdominal organs. Lace-like in pigs, carnivores and the horse, sheetlike in ruminants.

gastrocolic omentum
the part of the greater omentum attached to the colon.
gastrohepatic omentum
the part of the lesser omentum attached to the liver.
greater omentum
the double fold of peritoneum derived from the dorsal mesogastrium that extends from the greater curvature of the stomach over the floor of the abdomen like an apron; poorly developed in the horse and well developed in ruminants.
lesser omentum
a peritoneal fold joining the lesser curvature of the stomach and the first part of the duodenum to the porta hepatis.
omentum majus
greater omentum.
omentum minus
lesser omentum.
References in periodicals archive ?
Omental torsion, especially that of the lesser omentum, is extremely rare; however, it should be considered in differential diagnosis of acute abdomen because it can cause acute surgical abdomen.
The vessels in the free border of the lesser omentum may be controlled by compression between the thumb and index finger of the left hand.
In non-fixed cadavers, the celiac trunkwas reached by the omentum, opening the flaccid part of the lesser omentum.
A case of abnormal peritoneal fold connecting the greater omentum with the liver, gall bladder, right kidney and lesser omentum has been observed (Satheesha, 2009).
The duodenum was kocherised and reduced through the lesser omentum where constriction was felt and released by incising few cms along the lesser curve.
The accessory right hepatic artery originated from the superior mesenteric artery, ascended in the free border of lesser omentum behind portal vein and bile duct.
Gall bladder has a great propensity to invade liver directly and to a lesser extend the stomach and duodenum; it also metastasizes frequently to liver, cystic and pericholedochal lymph nodes in the lesser omentum and lymph nodes behind the first portion of the duodenum.