FUNCTIONAL ENDOSCOPIC SINUS SURGERY OUTCOMES IN CHRONIC RHINOSINUSITIS: A PROSPECTIVE CLINICAL STUDY

Background: Chronic rhinosinusitis (CRS) is a persistent inflammatory disease that significantly reduces quality of life. Functional endoscopic sinus surgery (FESS) is indicated when medical therapy fails. Objective: To assess clinical and endoscopic outcomes of FESS in medically refractory CRS. Methods: Adult CRS patients undergoing FESS were prospectively evaluated using nasal endoscopy, CT scoring, and SNOT-22 before surgery and during 12-month follow-up. Results: FESS produced significant improvement in symptoms and endoscopic findings. Both CRS phenotypes showed clinically meaningful benefit, with low complication and revision rates. Better outcomes were associated with adherence to postoperative therapy and absence of asthma. Conclusion: FESS is a safe and effective treatment for refractory CRS, resulting in sustained symptom relief and improved sinonasal function.