|This article needs additional citations for verification. (December 2006)|
A portacaval anastomosis (also known as porto-systemic anastomosis or portal caval system) is a specific type of anastomosis that occurs between the veins of portal circulation and those of systemic circulation. The inferior end of esophagus and the inferior part of the rectum are some of the most important sites of portal systemic anastomosis.
In portal hypertension, as in the case of cirrhosis of liver, the anastomoses become congested and form venous dilatations. Such dilatation can lead to esophageal varices and rectal hemorrhoids. Caput medusaes can also result.1
Specific types include:
|Region||Name of clinical condition||Portal circulation||Systemic circulation|
|Esophageal||Esophageal varices||Esophageal branch of left gastric vein||Esophageal branches of Azygos vein|
|Rectal||Rectal Varices||Superior rectal vein||Middle rectal veins and inferior rectal veins|
|Paraumbilical||Caput medusae||Paraumbilical veins||Superficial epigastric vein|
|Retroperitoneal||(no clinical name)||Right colic vein, middle colic vein, left colic vein||Renal vein, suprarenal vein, paravertebral vein, and gonadal vein|
|Intrahepatic||Patent ductus venosus||Left branch of portal vein||Inferior vena cava|
It can be one of the conditions caused by portal hypertension. A useful mnemonic is that portal hypertension causes problems in the butt, the gut, and caput. A dilated inferior mesenteric vein may or may not be related to portal hypertension.
- Gray's Anatomy for Students Gray H, Drake R, Vogl W, Mitchell A, Tibbitts R, Richardson P. Philadelphia: Elsevier/Churchill Livingstone; 2010. p. 226
- Compendio de Anatomía humana. Testut- LaTarjet
|This article about a medical condition affecting the circulatory system is a stub. You can help Wikipedia by expanding it.|
Content from Wikipedia, the Free Encyclopedia
What Is This Site? The Ultimate Study Guide is a mirror of English Wikipedia. It exists in order to provide Wikipedia content to those who are unable to access the main Wikipedia site due to draconian government, employer, or school restrictions. The site displays all the text content from Wikipedia. Our sponsors generously cover part of the cost of hosting this site, and their ads are shown as part of this agreement. We regret that we are unable to display certain controversial images on some pages the site at the request of the sponsors. If you need to see images which we are unable to show, we encourage you to view Wikipedia directly if possible, and apologize for this inconvenience.
A product of XPR Content Systems. 47 Union St #9K, Grand Falls-Windsor NL A2A 2C9 CANADA