Systematic review: Outcomes of bariatric surgery in patients with inflammatory bowel disease and de-novo IBD development after bariatric surgery

Surgeon. 2023 Apr;21(2):e71-e77. doi: 10.1016/j.surge.2022.04.008. Epub 2022 Jun 1.


A large proportion of patients diagnosed with inflammatory bowel disease are obese. Outcomes of bariatric surgery in patients with IBD and on IBD disease course itself is not clear. Furthermore, there is some evidence that bariatric surgery can precipitate the development of de-novo IBD. Thus, the aim of this systematic review was to summarise the evidence from the literature surrounding these questions. A comprehensive literature review was conducted based on the preferred reporting items for systematic reviews and meta-analysis guidelines (PRISMA). PUBMED, and MEDLINE databases was searched using a combination of keywords and MeSH terms including "gastric bypass", "sleeve gastrectomy", "Roux-en-Y", "Duodenal switch", "RYGB", "bariatric surgery" and "inflammatory bowel disease", "Crohn's disease" ,"Ulcerative colitis". Studies published up to March 2020 were included in this analysis. 22 studies met the inclusion criteria. Studies revealed that bariatric surgery is safe and effective for patients with IBD and resulted in significant weight loss at both the 6-month and 12-month time points. Furthermore, multiple studies reported de-novo IBD development following bariatric surgery in a selection of patients.

Keywords: Bariatric surgery; Crohn's disease; Inflammatory Bowel Disease; Ulcerative Collitis.

Publication types

  • Systematic Review
  • Review

MeSH terms

  • Bariatric Surgery* / adverse effects
  • Bariatric Surgery* / methods
  • Gastrectomy / methods
  • Gastric Bypass* / methods
  • Humans
  • Inflammatory Bowel Diseases* / complications
  • Inflammatory Bowel Diseases* / surgery
  • Obesity / surgery
  • Obesity, Morbid*
  • Retrospective Studies