Richter’s hernia

A rare hernia that occurs when the antimesenteric wall of the intestine protrudes through a defect in the abdominal wall.

Only one intestinal wall protrudes through the defect, such that the lumen of the intestine is incompletely contained in the defect, while the rest remains in the peritoneal cavity.

It can result in strangulation and necrosis in the absence of intestinal obstruction.

It is a dangerous type of hernia.

If such a herniation becomes necrotic, perforation and peritonitis may result.

Has been noted in laparoscopic port-sites, usually when the fascia is not closed for ports larger than 10mm.

Treatment is resection and anastomosis.