Lipoma of the Stomach Prolapsing into the Duodenal Bulb and Causing a Duodenal Ulcer: A Case Report

We report a case of lipoma in the antum of the stomach which prolapsed into the duodenal bulb and caused a duodenal ulcer, speculated to have been induced by the friction of its top against the duodenal mucosa. Although the ulcer healed after the administration of a proton pump inhibitor, the symptom of epigastric discomfort continued, suggested to be due to prolapsing. Therefore, a laparoscopic operation was conducted. The incidence of lipoma of the stomach is rare, and cases of its prolapse into the duodenum are very few. Furthermore, it is extremely rare for it to cause a duodenal ulcer. Because these features made this case clinically interesting, we report it here.