Abstract
The frontal sinus cyst is a disease that is difficult to treat, because there are many cases that repeat recurrence even if they are operated. We evaluated 28 cases (30 sides) of the frontal sinus cyst who were operated in the past 6 years. The frontal sinus cyst is classified base on causes as follows : idiopathic cyst, postoperative cyst, traumatic cyst. The postoperative cysts are observed most frequently. There are few traumatic cysts. As for the rate of postoperative improvement in symptoms, endonasal sinus surgery is better than external incision operation. The rate of postoperative patency of the duct was high in cases who had undergone endonasal sinus surgery and silicon tube insertion to the duct. Therefore, in operation of a frontal sinus cyst, we should first select endonasal sinus surgery. In patients in whom endonasal sinus surgery is impossibe, we should perform external incision operation concomitantly with endonasal sinus surgery and place a silicon tube to the duct for 6 months at the shortest.
