RESUMEN
Obesity is a growing health concern worldwide, with bariatric surgeries such as gastric bypass providing an effective treatment choice. However, a rare complication of gastric bypass is a duodenal ulcer. Currently, there is no exact incidence of this complication, and only a few case reports have been published in the literature. Presented is a case of a 32-year-old patient, eight years status post gastric bypass, who was evaluated for surgical repair of a large anterior perforated duodenal ulcer. This case report explores the relationship between patient history and gastric bypass surgery in the case of duodenal ulcer formation and perforation, as well as the diagnostic difficulty and modalities for duodenal ulcers in post-gastric bypass patients.