A 68-year-old man consulted our hospital because of back pain. A chest computed tomography (CT) demonstrated a high-density foreign body in the esophageal wall. There was no evidence of pneumomediastinum. Endoscopic examination demonstrated a large fish bone that was stuck in the esophageal wall. It was dislodged and moved into the stomach. The bone was excreted through the intestinal tract on the seventh hospital day. Unintentional ingestion of large fish bones must be considered potentially dangerous. Complications such as esophageal perforation or mediastinitis should be confirmed by CT; and then, the esophageal foreign body should be removed as soon as possible.
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