Superior mesenteric vein
The superior mesenteric vein is a blood vessel that drains blood from the small intestine (jejunum and ileum). At its termination behind the neck of the pancreas, the superior mesenteric vein combines with the splenic vein to form the hepatic portal vein. The superior mesenteric vein lies to the right of the similarly named artery, the superior mesenteric artery, which originates from the abdominal aorta.
| Superior mesenteric vein | |
|---|---|
 The abdomen viewed from the front, showing the portal venous system, showing the superior mesenteric vein and its tributaries. (Lienal vein is an old term for splenic vein.) | |
| Details | |
| System | Hepatic portal system |
| Drains to | hepatic portal vein |
| Artery | superior mesenteric artery |
| Identifiers | |
| Latin | vena mesenterica superior |
| TA | A12.3.12.018 |
| FMA | 14332 |
| Anatomical terminology | |
Structure
Tributaries of the superior mesenteric vein drain the small intestine, large intestine, stomach, pancreas and appendix and include:
- Right gastro-omental vein (also known as the right gastro-epiploic vein)
- inferior pancreaticoduodenal veins
- veins from jejunum
- veins from ileum
- middle colic vein - drains the transverse colon
- right colic vein - drains the ascending colon
- ileocolic vein
Clinical significance
Thrombosis of the superior mesenteric vein is quite rare, but a significant cause of mesenteric ischemia and can be fatal. It is estimated that 10-15% of mesenteric ischemia is due to mesenteric thrombosis.
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References
- ^ Tessier DJ, Williams RA, Mesenteric ischemic thrombosis, eMedicine, URL: http://www.emedicine.com/med/topic2753.htm, Accessed July 30, 2005.
Additional images
Abdominal cavity.Superior mesenteric vein.Deep dissection.
External links
- "Mesenteric vein superior". Medcyclopaedia. GE. Archived from the original on 2008-06-06.
- Anatomy photo:39:02-0102 at the SUNY Downstate Medical Center - "Intestines and Pancreas: The Superior Mesenteric Vessels"
- Anatomy image:8696 at the SUNY Downstate Medical Center
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