The patient was a 55-year-old male in whom peritoneal dialysis had been introduced for chronic renal failure since 42-years-old. He developed hernatomesis suddenly during the hospitalization for ileus caused by sclerosing peritonitis. Endoscopic examination showed a circular peeled esophageal mucosa, so called "mucosal bridge", and some coagulations in the lower esophagus. His condition could not improve by fasting and intravenous hyperalimenta-tion with H
2-blockers. He died of heart failure on 21 days after hematomesis. Suhmucosal dissection of the esophagus is rare in esophageal disorders and the etiology remains uncertain. In this case, we think that submucosal hematoma caused by mechanical injury relayed to vomiting ruptured and the esophageal mucosa was then dissected.
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