title: A rare case of acute abdomen due to strangulated Waldayer's hernia.
abstract: BACKGROUND
  An internal hernia is the herniation of an intestinal segment into an intra-peritoneal fossa, is an uncommon cause for intestinal obstruction and is difficult to diagnose preoperatively.
  
  
  METHODS
  We report a male patient 19 years old presenting with acute abdomen due to a strangulated Waldayer's hernia.
  
  
  CONCLUSIONS
  The paraduodenal hernias are more common in males (M:F ratio 3:1). The average age at diagnosis is 38.5 years clinically presenting with chronic intermittent post-parandial abdominal pain. An accurate incidence of paraduodenal hernias in infancy and childhood is unknown, but is quite rare.
  
  
  CONCLUSIONS
  Internal complicated hernias are difficult to diagnose and once discovered intra-operative anatomical variations are present with special attribution to the management of the hernia sac.
authors.affiliation: Department of General Surgery, Cairo University, Egypt.
authors.forename: Mohammed
authors.initials: M
authors.lastname: Hassan
authors.forename: Ahmed
authors.initials: A
authors.lastname: Hussein
authors.forename: Amr
authors.initials: A
authors.lastname: Ayad
authors.forename: Karim
authors.initials: K
authors.lastname: Hoseny