Superior mesenteric venous thrombosis

Thrombosis is often secondary to: ① portal vein congestion and stagnation of blood flow caused by cirrhosis or extrahepatic compression; ② purulent infections in the abdominal cavity, such as gangrenous appendicitis, ulcerative colitis, strangulated hernia, etc .; ③ some Blood abnormalities, such as polycythemia vera, hypercoagulable state caused by oral contraceptives; ④ injuries caused by trauma or surgery, such as mesenteric hematoma, splenectomy, right colonectomy, etc. About a quarter of patients have no obvious cause and are called primary mesenteric venous thrombosis.

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