Internal herniation after laparoscopic antecolic Roux-en-Y gastric bypass: a nationwide Danish study based on the Danish National Patient Register

In the period from 2006 to 2011, mesenteric defects were not routinely closed during LRYGB in Denmark. The cumulative 5-year incidence of IH/IIH after LRYGB was 4% in a median follow-up period of 38 months (range 16−87) in Denmark when data was retrieved from the NPR.