Are giant Brunner's gland hyperplasia and gastric heterotopia unknown complications of Roux-en-Y gastric bypass?

Analysis of the polyp confirmed the presence of gastric heterotopia in two patients and a Brunner's gland hyperplasia without dysplasia in one patient. The exploration of the duodenum was performed immediately for two patients, who benefited from a one-step procedure using a transnasal scope to pass through the LAMS and perform the resection using a small-caliber snare by underwater technique. [Extracted from the article]