상악동 진주종.

Cholesteatoma is common disease entity within the middle ear cavity but is rarely found in the paranasal sinuses, especially the maxillary sinus. We experienced a case of cholesteatoma of the maxillary sinus without history of previous trauma or operation. The patient was not improved by functional endoscopic sinus surgery. The mucosa of the maxillary sinus was removed through the Caldwell-Luc approach, and heavy saline irrigation was performed. After reoperation, the postoperative period was uneventful, and there was no sign of recurrence on endoscopic examination. [ABSTRACT FROM AUTHOR]