Abstract
We report a case of a maxillary sinus foreign body that was not identified before surgery. A 53-year-old man visited our hospital complaining of nasal obstruction and nasal discharge. X-ray and CT examinations revealed left maxillary sinusitis. We therefore performed endoscopic sinus surgery under the diagnosis of chronic sinusitis. Two foreign bodies were removed from the maxillary sinus, which turned out to be root canal filling agents called gutta-percha point. Because the patient has been free of complaints after removing the root canal points, this sinusitis could be attributable to movement of the root canal point. We should be aware of foreign bodies that go undetected by radiologic examinations.
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