Gastrointestinal hemorrhage associated with chronic mesenteric venous occlusion.

Chronic mesenteric venous thrombosis without involvement of the splenic or portal veins may lead to gastrointestinal hemorrhage from mesenteric varices. Three cases are presented in this report; 1 patient died secondary to blood loss and 2 patients have experienced a benign clinical course. The presentation, methods of diagnosis, and therapeutic options for this disorder are described.