Abstract:

Objective   To assess the methods and efficacy of endoscopic surgery for frontal sinus diseases.  Methods   Thirtythree patients（56 cases）with frontal sinus diseases were involved in this study. With the foundation of HRCT, drainage passage and ostium of the frontal sinus were identified and opened through  the landmark of agger nasi cells, the superior attachment of the uncinate process and the anterosupterior basal lamella of the bulla. Results  The ostium of the frontal sinus was identified in all patients without serious complications. All patients were followed up by endoscopy for 3 to 18 months. Among them, 27 cases were cured,21 cases were effective and 8 cases were ineffective. Conclusion   HRCT scan is a  basic landmark for endoscopic surgery to identify the ostium of the frontal sinus. Removing the frontal recess lesions  and keeping  drainage passage of the frontal sinus are key points to cure frontal sinus diseases.

Key words: Endoscopy; Agger nasi cell; Uncinate process; Frontal sinus