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Meso torsion at jejunojejunostomy anastomosis is an infrequent cause of chronic abdominal pain after bariatric surgery. The etiology is multifactorial, the most common cause is structural alterations in the anastomosis of the jejunojejunostomy. Its diagnosis is a clinical challenge due to its non-specificity and it is not uncommon for it to be intraoperative. The reversal of the torsion or the creation of a new anastomosis are the therapeutic key.

Marginal ulcer is one of the most relevant complications after Roux-en-Y Bypass. The etiopathogenesis is multifactorial. Our objective is to determine the factors involved in its development. Material and methods: We included patients who underwent upper after a Roux-n-Y gastric bypass due to obesity between January-2011 to February-2022 with UM as a complication. The patients were categorized in two groups: favourable medical treatment response (Group A) and those who didnt response requiring surgical treatment (GroupB). Results: More than 60% of the sample responded to medical treatment, meanwhile the rest required revision surgery, mayority gastrojejunal reanastomosis. Both groups female sex predominated. The most frequently associated risk factors were Helicobacter pylori infection, smoking, DM-II, SSRIs and NSAIDs treatment. All variables were analyzed using logistic regression analysis and no association could be established between risk factors and delivery of UM. Conclusion: We couldn't determine the predictive factors of response to UM treatment. Therefore, more studies would be needed to determine which risk factors could be involved in the appearance of UM.

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