[CT findings in ileo-caval thrombosis (author's transl)]

Thrombosis of a large vein can be demonstrated by CT. The thrombosed vein has a hypodense lumen, with a somewhat increased diameter which does not opacify after intravenous contrast injection, but which shows a narrow hyperdense margin. Collateral vessels in the pelvic or paravertebral plexus and dilated veins in the abdominal skin are indirect evidence of ileo-caval thrombosis. CT can also demonstrate the cranial extent of a caval thrombosis. Venous thrombosis demonstrated by CT is an important additional finding in the pre-operative examination of the abdomen.