Encyclopedia entry

Duodenum

Version 1

Abstract

The position of the duodenum does not vary greatly. The third part of the duodenum generally crosses in front of the third lumbar vertebra, and not infrequently it is as low as the fourth; it rarely comes into relation with the fifth lumbar (three of 337 subjects). In four cases the duodenum ended on the right side of the vertebral column. The duodenum may be duplicated and duodenal diverticula are not uncommon. They are usually single, consist of all the coats of the intestine, and project from the concave side of the duodenum and, consequently, toward the pancreas.

The position of the duodenum does not vary greatly. The third part of the duodenum generally crosses in front of the third lumbar vertebra, and not infrequently it is as low as the fourth; it rarely comes into relation with the fifth lumbar (three of 337 subjects). In four cases the duodenum ended on the right side of the vertebral column.

The duodenum may be duplicated and duodenal diverticula are not uncommon. They are usually single, consist of all the coats of the intestine, and project from the concave side of the duodenum and, consequently, toward the pancreas.

The duodenum is one part of the alimentary canal that, during embryonic life, is liable to physiologic occlusion by proliferation of its epithelial lining. This may persist as an atresia or become the focus of a stenosis.

Megalo-duodenum has been reported.

Anomalous pancreatic nodules have been found in the wall of the duodenum.

Riferimenti dell’opera originale

Elenco riportato come compare nella fonte, senza normalizzazione dei formati bibliografici.

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Anatomical classification

Systems:
Digestive system

Content provenance

Translation

Italian translation of «Duodenum — Illustrated Encyclopedia of Human Anatomic Variation: Opus I: Muscular System» by Ronald A. Bergman, Adel K. Afifi, Ryosuke Miyauchi. Source: https://www.anatomyatlases.org/AnatomicVariants/OrganSystem/Text/Duodenum.shtml Original work distributed under the CC BY-NC-SA 4.0 licence (https://creativecommons.org/licenses/by-nc-sa/4.0/deed.it). Translation by Redazione AIVA. Changes from the original: Traduzione italiana del testo originale inglese, che resta consultabile nella versione inglese di questa pagina. Il contenuto è stato riorganizzato nel formato scheda del portale (sintesi, testo, riferimenti) senza modificarne le affermazioni. Le figure non sono state copiate: sono collegate alla pagina d’origine. This publication is not approved or endorsed by the authors of the original work.

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