Isolated mesenteric vein thrombosis

Definition

A rare intestinal disease characterized by isolated thrombosis of the mesenteric veins without involvement of the splenic or portal veins, potentially causing mesenteric ischemia. It may be primary/idiopathic or due to one or more local or systemic predisposing conditions, and may be acute/subacute or chronic, the latter being used for patients with symptoms lasting longer than 4 weeks but without bowel infarction, or patients without recent symptoms, where the thrombosis is an incidental finding. Symptoms depend on the extent and severity of thrombosis and often involve prolonged nonspecific abdominal complaints.