Abstract
A 38-year-old woman suffering severe throat pain immediately after eating baked fish was found to have a metallic foreign object at the left piriform sinus that disappeared a few minutes later and could not be located using flexible endoscopy or direct esophageal endoscopy under general anesthesia. The next morning computed tomography (CT) showed that the foreign object had penetrated deeply into the hypopharyngeal mucosa. We removed it using a microscopic endo-laryngeal surgery technique.