Portal thrombosis: dynamic CT features and course.

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Abstract
Portal thrombosis was diagnosed on computed tomography (CT) in 10 patients and confirmed by sonography. CT demonstrated decreased density of the portal vessels in 9 patients with peripheral arterial concentration of contrast material surrounding the intraluminal thrombus. In 1 patient, a fresh thrombus was seen as an increase in intraluminal density on the pre-contrast scan. The involved vessels were generally enlarged. Three patients had follow-up scans, which revealed a cavernoma in 2 and complete patency of the portal vein and its branches following anticoagulant therapy in 1. In the latter patient, localized abnormal intrahepatic blood flow suggested infarction of portal origin as the result of clot migration.

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