duodenum


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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

/du·o·de·num/ (doo″o-de´num) the first or proximal portion of the small intestine, extending from the pylorus to the jejunum.duode´nal

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.

duodenum

[do̅o̅′ədē′nəm, do̅o̅·od′inəm] pl. duodena, duodenums
Etymology: L, duodeni, 12 fingers
the shortest, widest, and most fixed portion of the small intestine, taking an almost circular course from the pyloric valve of the stomach so that its termination is close to its starting point. It is about 25 cm long and is divided into superior, descending, horizontal, and ascending portions. The superior portion extends from the pylorus to the neck of the gallbladder. The descending portion extends from the neck of the gallbladder at the level of the first lumbar vertebra to the cranial border of the fourth lumbar vertebra. The horizontal portion passes from right to left, from the level of the fourth lumbar vertebra to the diaphragm. The ascending portion rises on the left side of the aorta to the level of the second lumbar vertebra, turning ventrally to become the jejunum at the duodenojejunal flexure. Compare jejunum, ileum.
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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. 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]

duodenum

(doo´ədē´nəm),
n the first, shortest, and most fixed portion of the small intestine. The duodenum courses from the pyloric valve of the stomach and terminates in a junction with the jejunum at the duodenojejunal flexure.

duodenum

the first or proximal portion of the small intestine, extending from the pylorus to the jejunum. It plays an important role in digestion of food because the bile and pancreatic ducts empty into it. See also digestive system.

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 ?
There was statistically significant increase of crypt depths in the duodenum (p [?
Our patient had severe CHF with an ejection fraction (EF) of 20% (reference range: 55%-0%), and we believe that the low EF could not provide sufficient blood to the duodenum in spite of the spontaneous resolution of JI.
All had endoscopic findings of pseudomelanosis in the duodenum with one case having pseudomelanosis extending into the antrum of stomach (Table-I).
They mostly occur on the right side as a result of anatomic proximity, although a few cases of fistulae from left kidney to the third portion of duodenum have been reported (5).
The malfixted gut subsequently becomes attached to the abdominal wall through the peritoneal formation fibrous stalks, known as Ladd's bands, and this often crosses the descending duodenum causing variable degrees of obstruction.
The expression of Pdx1 from the duodenum during development is important in determining where the pancreatic bud will develop (43).
The duodenum was excised and placed in Tyrode's solution contained in organ bath of 50 ml capacity and bubbled with 100% O217 and maintained at a temperature of 37 +- 2oC18.
5 litres of haemoperitoneal fluid and over anti-mesenteric border of duodenum (D2 and D3) a longitudinal laceration of about 7-8 cms (Full thickness injury) was noted.
All endoscopy reports were searched for patients with diverticuli in the duodenum.
Primary GI CCSs are extremely uncommon with a predilection for the jejunum [n = 11] andileum [n = 8] (70% of cases), whilst the stomach, colon, pancreas, and duodenum are rarely involved [2-5].
Most of the duodenal duplication cyst are located on the second or third part of duodenum and share muscle layers.
Computed tomography (CT) scan of upper abdomen showed an expansile, well-defined, thin-walled, homogeneous, fat-density SOL with thin internal septa in the second part of duodenum causing luminal filling defect, measuring 84 x 36 x 32 mm [Figure 2].