INTRODUCTION: Rhinosinusitis (CRS) is chronic inflammation of nose and paranasal sinuses. Its pathophysiology is poorly described and seems to be multifactorial. With the arrival of Functional Endoscopic Sinus Surgery, the approach to the patient with CRS has been changed. Certain anatomical variations of lateral wall of nose are important as they contribute in blockage of osteomeatal complex, ventilation and drainage of paranasal sinuses. Preoperative evaluation of these variants is also important being a part of surgical safety.