CHARACTERISTICS OF CHRONIC RHINOSINUSITIS PHENOTYPES IN PATIENTS UNDERGOING FUNCTIONAL ENDOSCOPIC SINUS SURGERY: AN OBSERVATIONAL COHORT RETROSPECTIVE STUDY.

This study analyzed the characteristics of chronic rhinosinusitis patients with and without nasal polyps failing conservative treatment and undergoing functional endoscopic sinus surgery as part of their treatment for chronic inflammatory sinonasal disease. The aim of this retrospective single-institution cohort study conducted at a university hospital tertiary referral center was to evaluate the characteristics of patients with both disease phenotypes in whom conservative treatment was unsuccessful. Patients who were surgically treated with functional endoscopic sinus surgery performed by two rhinology surgeons during a one-year period (2016) were enrolled in the study.