Clinical features of acute esophageal mucosal lesions and reflux esophagitis Los Angeles classification grade D: A retrospective study

Figure 3 Visual definition of endoscopic findings regarding black esophagus. A: In the acute esophageal mucosal lesions group, black esophagus was defined as circumferentially appearing black esophageal mucosa; B: Even with a small amount of black component, we diagnosed black esophagus.