Pathogenesis of Chronic Sinusitis in Relationship to Tobacco Smoke Exposure

Percutaneous 2-3 mm biopsies of middle turbinate mucosae and nasal polyps will be obtained with 5 mm Thrucut® (Smith \& Nephew, Memphis, TN) biopsy forceps. Generally, 2-3 specimens will be obtained from each side as in previous studies. Healthy controls and subjects with CRS without NP will have biopsies from both middle turbinates. Subjects with CRS with NP will have two nasal polyp biopsies and one middle turbinate biopsy.