Duodenum


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to Duodenum: pancreas, duodenitis

duodenum

 [doo″o-de´num]
the first or proximal portion of the small intestine, about 25 cm (10 inches) long, extending from the pylorus to the jejunum. It plays an important role in digestion of food because both the common bile duct and the pancreatic duct empty into it. It is subject to various disorders, the most common of which are peptic ulcers and obstruction due to dilatation of the intestine and stasis of the duodenal contents. The duodenum also may be the site of diverticula, fistulas, and occasionally tumors. See also digestive system.

du·o·de·num

, gen.

du·o·de·ni

, pl.

du·o·de·na

(dū'ō-dē'nŭm, dū-od'ĕ-nŭm; -od'ĕ-nă, -dē'nă), [TA] Although the correct classical pronunciation of this word stresses the second-last syllable (duode'num), the third-to-last syllable is often stressed in the U.S. (duod'enum).
The first division of the small intestine, about 25 cm or 12 fingerbreadths (hence the name) long, extending from the pylorus to the junction with the jejunum at the level of the first or second lumbar vertebra on the left side. It is divided into the superior part, the first part of which is the duodenal cap, the descending part, into which the bile and pancreatic ducts open, the horizontal (inferior) part and the ascending part, terminating at the duodenojejunal junction.
[Mediev. L. fr. L. duodeni, twelve]

duodenum

(do͞o′ə-dē′nəm, dyo͞o′-, do͞o-ŏd′n-əm, dyo͞o-)
n. pl. duodena (do͞o′ə-dē′nə, dyo͞o′-, do͞o-ŏd′n-ə, dyo͞o-) or duodenums
The beginning portion of the small intestine, starting at the lower end of the stomach and extending to the jejunum.

du′o·de′nal (do͞o′ə-dē′nəl, dyo͞o′-, do͞o-ŏd′n-əl, dyo͞o-) adj.

du·o·de·num

, pl. duodena (dūō-dēnŭm, -nă) [TA]
The first division of the small intestine, about 25 cm in length, extending from the pylorus to the junction with the jejunum at the level of the first or second lumbar vertebra on the left side. It is divided into the superior part, the first part of which is the duodenal cap, the descending part, into which the bile and pancreatic ducts open; the horizontal (inferior) part; and the ascending part, terminating at the duodenojejunal junction.
[Mediev. L. fr. L. duodeni, twelve]

duodenum

The C-shaped first part of the small intestine into which the stomach empties. The ducts from the GALL BLADDER and PANCREAS enter the duodenum. The duodenum is said to be 12 finger-breadths long-hence the name.

duodenum

that part of the SMALL INTESTINE connecting the stomach to the ileum. It is about 25 cm long in man. The wall is highly folded internally with microscopic projections called VILLI, which increase the surface area for digestion and absorption. Within the wall are BRUNNER'S GLANDS and PANETH CELLS which, together with secretions from the pancreas entering the duodenum via the bile duct, produce a whole range of enzymes to complete digestion.

Duodenum

The first of the three segments of the small intestine. The duodenum connects the stomach and the jejunum. Most peptic ulcers are in the duodenum.

du·o·de·num

, pl. duodena (dūō-dēnŭm, -nă) [TA]
The first division of the small intestine, about 25 cm in length, extending from the pylorus to the junction with the jejunum at the level of the first or second lumbar vertebra on the left side.
[Mediev. L. fr. L. duodeni, twelve]

Patient discussion about Duodenum

Q. What is the difference between duodenal ulcer and stomach ulcer? I was diagnosed recently with duodenal ulcer. I heard the term stomach ulcer but not duodenal. What causes duodenal and what cause stomach ulcer? And how do they treat duodenal ulcer?

A. The duodenum is right after the stomach. They are both (as published a few years back) caused 90% of the time from a bacteria named helicobacter pylori. Hence the treatment for it is probably antibiotics. But I guess that should be your doctor’s call. Good luck!

More discussions about Duodenum
References in periodicals archive ?
Etiology and Pathogenesis.--Gastric foveolar metaplasia of the duodenum is generally considered as a reactive/ reparative process usually secondary to acid-peptic injury, duodenal ulcer, H pylori infection, or chronic inflammation.
Sporadic nonampullary tubular adenoma of the duodenum: Prevalence and patients' characteristics.
Although Arg supplementation did not affect the performance and ascites mortality in the current experiment but ileal VW, duodenum, and jejunum VH/CD ratio was increased and jejunum CD decreased by dietary Arg addition.
During exploration, a 1.4 cm tumor was seen in the stomach and a 3.0 cm tumor was in the duodenum. The latter had abundant blood supply located in the descending part of duodenum.
Superior mesenteric artery syndrome is an acute or chronic picture that occurs as a result of compression of the second or third part of the duodenum between the aorta and the upper part of SMA (7).
The fat plane between the duodenum and the pancreas was obliterated by the tumor.
Four patients developed local recurrences either at the resection or incision site, with two of these cases (case 3 and case 6) ultimately involving the GI tract (cecum and duodenum) by direct extension.
Small intestines, including the duodenum, jejunum and ileum, were immediately removed and cleaned using 0.01 M PBS, followed by fixing in a 4% polyformaldehyde solution for 24 h.
In this manuscript, we present a case of nail ingestion in a boy of 10 years of age, causing sealed perforation of duodenum.
Endoscopy refers to the removal of ingested objects from the esophagus, stomach and duodenum by endoscopic techniques.
They cover head and neck; breast and neurovascular system of the upper extremity; thorax; abdominal wall; small and large intestines; stomach, duodenum, and esophagus; liver, biliary system, pancreas, and spleen; kidney, adrenal, ureters, and bladder; pelvis; and aorta, iliac arteries, and blood supply to the lower extremity (vascular exposure).
Brunner's gland adenomas are largely benign tumours located predominately in the first part of the duodenum. They rarely become symptomatic, and if they do, often present with upper gastrointestinal bleeds.