Marginal ulceration "MU", which presents as an ulcer at the margins of the gastrojejunostomy on the jejunal side, is a common late complication after RYGB. Its incidence after RYGB ranges from as low as 0.6 to as high as 16%. In our hands with the laparoscopic hand-sewn technique for the GJ, the incidence is 1.4%. The presence of specific technical factors - staple-line dehiscence or gastro-gastric fistula, enlarged pouch, foreign material and local ischemia - and environmental factors - tobacco, NSAID´s, alcohol consumption, and H pylori infection among others - have been associated with marginal ulceration however the exact etiopathogenesis has not been completely elucidated.