Portal venous system thrombosis

Discussion:

The portal venous system consists of the mesenteric, splenic and portal veins. Occlusion of portal veins causes congestion of liver, spleen and bowel loops due to increased venous pressure and the development of venous collaterals.

Acute thrombosis may be difficult to detect in non-contrast basis as the thrombus may be iso or hypodense and not usually be hyperdense. The diagnosis is made on the portal venous phase of contrast-enhanced studies.

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