Introduction & Objective : Chronic rhinosinusitis (C.R.S.) is one of the most common diseases in the world. Polyposis is a complication of C.R.S., due to allergy or inflammation. The purpose of this study was detection of the incidence of polyposis in patients with C.R.S.

Materials & Methods : This study was carried out on 192 patients with C.R.S. who underwent functional endoscopic sinus surgery during 2000-2003 in Hamadan. All patients with C.R.S symptoms referred to ENT clinics were examined by otolaryngologist and after establishing diagnosis of C.R.S. they received medical treatment and after nose and para nasal sinuses CT scan, if there was indication, FESS was done. The patients who had polyps were followed up to one year, and the results analyzed with SPSS.           

Results : According to the results, incidence of polyposis in 192 patients with C.R.S. was 40%, the sex distribution of the patients with polyposis was 60% in male and 40% in female. The age mean was 39.2 year. Involved sinuses in decreasing order of frequency was, anterior ethmoid , maxilla, Posterior ethmaid, sphenoid, sphenoid and frontal. 43% of the patients had history of allergy. Recurrence happened in 6.6% after one year follow up.

Conclusion : Because of disabling symptoms and severe complications of nasal polyposis, it is recommended more study in the future to find etiology and preventive ways for nasal polyposis in Hamadan.