Abstract
We experienced a rare case of spontaneous mesenteric hematoma. A 73-year-old man was admitted to the hospital because of suddenly developed lower abdominal pain. Abdominal findings showed peritoneal irritation on the left lower quadrant. Abdominal ultrasonography and computed tomography (CT) revealed a well-defined lump measuring approximately 10cm in size. Emergency celitomy was performed and a hematoma was detected in the sigmoid mesocolon. However, there was no intestinal injury or disruption of any blood flow. Accordingly, evacutaion of the hematoma and drainage were undertaken. the postoperative course was uneventful. In the present case, there was no previous history of bleeding tendency nor abdominal trauma.