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Upper gastrointestinal endoscopy findings. A-C: First upper gastrointestinal endoscopy: Typical endoscopic findings of AEN; D and E: Third upper gastrointestinal endoscopy: Improvement/resolution of AEN after treatment. Complete disappearance of the black mucosa with whitish membranes covering the subepithelial surface of the esophagus. AEN: Acute esophageal necrosis.
