Frontal Sinus Radical Surgery

1. After the frontal sinus drainage, the acute inflammation has been controlled, but the lesion has not been cured. 2. Repeated acute episodes of chronic frontal sinusitis are ineffective through medication, catheter flushing, and nasal frontal canal expansion, or a fistula has been formed in the anterior inferior wall of the frontal sinus. 3. Frontal sinusitis causes intraorbital or intracranial complications. 4. Frontal sinus cyst, osteoma or foreign body, if necessary for surgery.