A rare cause of acute abdominal pain: primary torsion of omentum majus.

Primary torsion of the omentum majus is a rare cause of acute abdomen and it commonly mimics acute appendicitis. An eight year old boy was admitted to our clinic with symptoms and clinical findings of perforated appendicitis. The patient underwent emergency laparotomy at which a normal appendix and serosanguinous fluid in the peritoneal cavity were observed. The operative diagnosis was primary torsioned omentum. In the present study, preoperative and operative findings of primary omental torsion that differentiated it from acute appendicitis are discussed in the light of the literature.