Portacaval anastomosis

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

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A portacaval anastomosis is a specific type of anastomosis that occurs between the veins of portal circulation and those of systemic circulation.

Specific types include:

Region	Name	portal circulation	systemic circulation
Esophageal	esophageal varices	left gastric vein	esophageal veins
Rectal	hemorrhoids	superior rectal vein	middle rectal veins and inferior rectal veins
Paraumbilical	caput medusae	paraumbilical veins	inferior epigastric vein
Retroperitoneal	(no clinical name)	right colic vein, middle colic vein, left colic vein	renal vein, suprarenal vein, and gonadal vein

It can be one of the conditions caused by portal hypertension.

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