Fig. 1

Upper gastrointestinal endoscopy images immediately after hematemesis. a A longitudinal extension of reddish or wine-colored mucosal thickening (asterisk), obstructing the esophagus, is seen from the midesophagus to the esophagogastric junction. b The submucosal hematoma (two asterisks) is displacing the esophageal mucosa (asterisk) toward the gastric cavity at the esophagogastric junction. A part of the displaced mucosa has a laceration with bleeding