Enterovenous fistula: unusual complication of Crohn disease.

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Abstract
An unusual complication in a patient with Crohn enterocolitis is presented. Ultrasound and computed tomographic studies shwoed stationary gas in the portal vein, and a presumptive diagnosis of septic ascending portal thrombophlebitis was made. Emergency laparotomy was performed and the terminal ileum was excised for recurrent Crohn disease. Pathologic examination showed a fistula from the lumen of the inflamed segment of the superior mesenteric venous system. Autopsy 1 month later showed organizing thrombi and fecal debris in the portal venules.