The duodenojejunal flexure or duodenojejunal junction is the border between the duodenum and the jejunum.
Contents
1Structure
2Clinical significance
3Additional images
4See also
5References
6External links
Structure
The ascending portion of the duodenum ascends on the left side of the aorta, as far as the level of the upper border of the second lumbar vertebra. At this point, it turns abruptly forward to merge with the jejunum, forming the duodenojejunal flexure. This forms the beginning of the jejunum.[1] The duodenojejunal flexure is surrounded by the suspensory muscle of the duodenum.[2]:274 It is retroperitoneal, so is less mobile than the jejunum that comes after it, helping to stabilise the jejunum.[3]
The duodenojejunal flexure lies in front of the left psoas major muscle, the left renal artery, and the left renal vein. It is covered in front, and partly at the sides, by peritoneum continuous with the left portion of the mesentery.
Clinical significance
The ligament of Treitz, a peritoneal fold, from the right crus of diaphragm, is an identification point for the duodenojejunal flexure during abdominal surgery.[4]:85
Additional images
Duodenojejunal fossa.
Front of abdomen, showing surface markings for duodenum, pancreas, and kidneys.
See also
This article uses anatomical terminology.
Duodenum
Transpyloric plane
References
This article incorporates text in the public domain from page 1170 of the 20th edition of Gray's Anatomy (1918)
^Federle, Michael P.; Rosado-de-Christenson, Melissa L.; Raman, Siva P.; Carter, Brett W., eds. (2017-01-01), "Small Intestine", Imaging Anatomy: Chest, Abdomen, Pelvis (Second Edition), Elsevier, pp. 636–665, ISBN 978-0-323-47781-9, retrieved 2021-01-26
^Drake, Richard L.; Vogl, Wayne; Tibbitts, Adam W.M. Mitchell; illustrations by Richard; Richardson, Paul (2005). Gray's anatomy for students. Philadelphia: Elsevier/Churchill Livingstone. ISBN 978-0-8089-2306-0.
^Schneider, Armin; Feussner, Hubertus (2017-01-01), Schneider, Armin; Feussner, Hubertus (eds.), "Chapter 2 - Anatomy, Physiology, and Selected Pathologies of the Gastrointestinal Tract", Biomedical Engineering in Gastrointestinal Surgery, Academic Press, pp. 11–39, ISBN 978-0-12-803230-5, retrieved 2021-01-26
^Jacob, S. (2007) Chapter 4: Abdomen; Human anatomy, A clinically-orientated approach.
External links
Anatomy figure: 37:06-04 at Human Anatomy Online, SUNY Downstate Medical Center - "The large intestine."
Anatomy photo:39:07-0105 at the SUNY Downstate Medical Center - "Intestines and Pancreas: The Duodenum"
Anatomy image:8155 at the SUNY Downstate Medical Center
v
t
e
Anatomy of the gastrointestinal tract, excluding the mouth
Upper
Pharynx
Muscles
Spaces
peripharyngeal
retropharyngeal
parapharyngeal
retrovisceral
danger
prevertebral
Pterygomandibular raphe
Pharyngeal raphe
Buccopharyngeal fascia
Pharyngobasilar fascia
Pyriform sinus
Esophagus
Sphincters
upper
lower
glands
Stomach
Curvatures
greater
lesser
Angular incisure
Cardia
Body
Fundus
Pylorus
antrum
canal
sphincter
Gastric mucosa
Gastric folds
Microanatomy
Gastric pits
Gastric glands
Cardiac glands
Fundic glands
Pyloric glands
Foveolar cell
Parietal cell
Gastric chief cell
Enterochromaffin-like cell
Lower
Small intestine
Microanatomy
Intestinal villus
Intestinal gland
Enterocyte
Enteroendocrine cell
Goblet cell
Paneth cell
Duodenum
Suspensory muscle
Major duodenal papilla
Minor duodenal papilla
Duodenojejunal flexure
Brunner's glands
Jejunum
No substructures
Ileum
Ileocecal valve
Peyer's patches
Microfold cell
Large intestine
Cecum
Appendix
Colon
Ascending colon
Hepatic flexure
Transverse colon
Splenic flexure
Descending colon
Sigmoid colon
Continuous
taenia coli
haustra
epiploic appendix
Rectum
Transverse folds
Ampulla
Anal canal
Anus
Anal columns
Anal valves
Anal sinuses
Pectinate line
Internal anal sphincter
Intersphincteric groove
External anal sphincter
Wall
Serosa / Adventitia
Subserosa
Muscular layer
Submucosa
Circular folds
Mucosa
Muscularis mucosa
Anatomy portal
Authority control
TA98: A05.6.02.009
UpToDate Contents
全文を閲覧するには購読必要です。 To read the full text you will need to subscribe.
…of malrotation on upper gastrointestinal contrast studies include low-lying or displaced duodenojejunal junction and coiling of the bowel with partial or complete mechanical obstruction. Infants with this…
…viper) The toxins produced affect either the presynaptic or postsynaptic junction. Toxins affecting the presynaptic junction include beta-bungarotoxin (krait), notexin (tiger snake), taipoxin (Taipan) …
…with RNS and SFEMG. Other clinical aspects of neuromuscular junction disorders are reviewed separately. The nicotinic neuromuscular junction is a complex, specialized structure incorporating the distal …
…divided into four anatomic areas including the cervical, thoracic, and lower thoracic/esophagogastric junction, and the abdominal esophagus ( and and ). The esophagus is composed of the mucosa, submucosa, muscularis …
… Ureteropelvic junction (UPJ) obstruction is a partial or intermittent total blockage of the flow of urine that occurs where the ureter enters the kidney. The etiology of UPJ obstruction includes both …
Barium contrast-enhanced radiographs are highly sensitive in the diagnosis of malrotation and observing duodenojejunal junction at the right side of midline-at an abnormal position-is the most specific finding of malrotation [1,2,3]. THE LATE DIAGNOSED INTESTINAL MALROTATION BY ABDOMINAL TOMOGRAPHY IN AN ADOLESCENT
The duodenojejunal junction is the point where the fourth segment of the duodenum, the ascending duodenum, meets and is continuous with the most proximal portion of the jejunum.The suspensory muscle of the duodenum attaches to the superior aspect of the duodenojejunal junction. ...
CT of the duodenojejunal junction. Chou CK(1), Chang JM, Tsai TC, Mak CW, Hou CC. Author information: (1)Department of Radiology, Chi Mei Foundation Hospital, Tainan, Taiwan, Republic of China. To determine the location of