Abstract
　　An 87-year-old woman who had been treated for schizophrenia developed corrosive esophagitis and gastritis after ingesting acid detergent in a suicide attempt. She vomited blood and was brought to our hospital. Emergency upper gastrointestinal endoscopy revealed circumferential erosion extending from the esophageal orifice to the pylorus, a black coating over the gastric luminal surface, and erosion in the duodenal bulb, leading to diagnosis of corrosive esophagitis and gastritis. Gastrointestinal perforation was not detected;conservative therapy resulted in remission, and she underwent 6-month endoscopic follow-up. Despite gradual fibrosis and scarring, no apparent stricture was observed. Only few cases of gastrointestinal injury due to strong acid agents treated with conservative therapy and endoscopic follow-up have been reported.