[A case of internal hernia through a defect in the falciform ligament treated with laparoscopic surgery].

A 22-year-old male was admitted to our hospital with abrupt onset of upper abdominal pain. Abdominal US and CT revealed dilatation of the small intestine between the abdominal wall and a lateral segment of the liver. After a diagnosis of an internal hernia through a defect in the falciform ligament, emergency surgery was performed. Laparoscopic investigation showed incarceration of the small intestine in a defect of the falciform ligament. After releasing an incarceration, the hernia orifice was opened to prevent relapse. He was discharged on the 4th postoperative day. Internal hernia through a defect in the falciform ligament is extremely rare, with six reported cases including our own in Japan. Characteristic images of abdominal US and CT enable preoperative diagnosis of this condition. Surgery should be performed at an early stage after onset. In patients with no prior history of surgery, laparoscopic techniques may be useful.