Abstract
We report two cases of primary omental torsion that we resected for laparoscopic operation. A 52-year-old man was admitted due to sudden onset of right upper abdominal pain. An emergency laparoscopic operation was performed under a diagnosis of acute abdomen. We found dark red ascites and torsion of the greater omentum, and resected the twisted omentum. In the second case, a 44-year-old woman was admitted for right abdominal pain. By abdominal helical CT, torsion of the greater omentum was diagnosed preoperatively. We resected the necrotic part of the omentum in a laparoscopic operation. Torsion of the greater omentum is a rare disease, and it is generally difficult to diagnose preoperatively. But in some cases, we can diagnose it by helical CT, and perform resection of the twisted omentum by laparoscopic operation.
