Early marginal ulcer following Roux-en-Y gastric bypass under proton pump inhibitor treatment: prospective multicentric study.

The incidence of ulcer in the gastrojejunal anastomosis within the first 2 months following Roux-en-Y gastric bypass under proton pump inhibitors is considerable and was not related to the use of non-steroidal anti-inflammatory drugs, highlighting the possibility of ischemia and foreign body as causal factors.