Currently, gastroptosis is rarely reported, and the actual prevalence is unknown. Similarly, the possible predisposing factor and cause remain unclear. A 69-year-old had melena for 1 week, and other symptoms were left upper abdominal pain, nausea, and vomiting especially postprandially that was persistent for several months with no response to medication. The nasogastric tube produced yellowish discharge and dark-colored undigested material. The CT scan showed obstruction of the gastroduodenal junction and gastroptosis. Endoscopy revealed a gastric lumen that was extended inferiorly and an occluded pyloric ring by a bleeding mass protruding from the duodenum. We report the first case of gastroptosis caused by gastric outlet obstruction secondary to duodenal tumor.
