[A case of drug-induced esophageal ulcer developed at the esophageal constriction due to the right aortic arch].

A 26-year-old male has a tooth extracted at a dental surgery, and was given 40 mg Froben, as an anti-inflammatory analgesic agent, and ingested one tablet without water. After 2 days, anterior chest pain occurred. Esophagography and endoscopy were performed and multiple esophageal ulcers were confirmed. Esophagography revealed an esophageal stenosis which was considered to be caused by the extramural compression on the oral side of the ulcers. In the chest roentogenography and CT scanning, the right aortic arch was observed. This case was diagnosed as having drug-induced esophageal ulcer developed at the esophageal constriction due to the vascular ring.