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A portacaval anastomosis (also known as portal 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 lower end of esophagus is one of the important sites for the portosystemic anastomosis. In portal hypertension, as in the case of cirrhosis of liver, the anastomosis opens and forms venous dilatation called esophageal varices. Their rupture causes severe and dangerous haematemesis (hematemesis). Specific types include:
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.
- Compendio de Anatomía humana. Testut- LaTarjet