Duodenum

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Related to Duodonum: duodenitis, pancreas

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!

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