Correlation between preoperative clinical diagnosis and histopathological findings in patients with rhinosinusitis.

Background: The diagnosis of chronic rhinosinusitis (CRS) or chronic rhinosinusitis with polyposis (CRSP) is typically clinical and based on the combination of medical history, physical examination, and imaging. The recommendation to perform surgery and the type of surgery is tailored to the diagnosis. The objective of this study is to determine the accuracy of preoperative clinical CRS or CRSP diagnosis in patients who underwent endoscopic sinus surgery.