Functional endoscopic sinus surgery (FESS) is an effective treatment for chronic or recurrent sinusitis. The endoscope used in FESS allow direct visualization of the diseased tissue and FESS is a functional procedure that addresses the restoration of physiologic mucociliary clearance, enabling the sinus mucosa to return its normal condition after the procedure. This study is aimed to evaluate correlation between post-operative symptom improvement and computed tomographic finding in patient with nasal polyps. For this retrospective study of endoscopic sinus surgery, chart of 111 patients were reviewed and preoperative complaints, clinical findings, computed tomographic evidence of extent of sinus disease, surgical outcome and complication were considered. The nasal stuffiness was the most common major symptom of nasal polyposis and 79% of these patients had improvement of their symptoms with first endoscopic surgery and the total number of opacified sinuses were correlated with the recurrence of the disease. The computed tomgraphic extent of disease was found to be a predictive for statistical outcome.