Introduction
Duodenal lesions are uncommon findings in patients submitting to esophagogastroduodenoscopy (EGD), with an incidence variable from less than 1% to 5% 1,2.
The most common lesions requiring resection are duodenal adenomas, which should be differentiated from other mucosal lesions, such as heterotopic gastric mucosa, and submucosal lesions, such as carcinoids and gastrointestinal stromal tumours. Gastric heterotopia is a benign and often asymptomatic condition consisting on the presence of gastric tissue in a place where is not normally found and it has been described in several locations through the gastrointestinal tract. Gastric heterotopia in duodenum usually is an incidental finding and it is most commonly found as multiple small polyps in the duodenal bulb2. In this report, we describe a rare case of a patient with gastric heterotopia in the third duodenal portion, treated with endoscopic resection under laparoscopic vision.