Introduction  Many patients undergoing functional endoscopic sinus surgery still have an uncontrolled clinical disease in the late post-operative period. Up to 11.4% of the patients will require a revision surgery. Findings such as the residual uncinated process and the lateralization of the middle turbinate were considered by some studies as being responsible for failure in the primary surgery...

Background: Chronic rhinosinusitis (CRS) is defined as an inflammation of the nose and paranasal sinuses characterized by two or more cardinal symptoms like nasal blockage/obstruction/congestion, discharge (anterior/posterior drip), facial pain/ pressure, reduction loss smell. Methods: The 55 patients diagnosed with CRS without polyps undergoing functional endoscopic sinus surgery were included...