Background : Chronic rhinosinusitis is inflammation of the mucoperiosteum lining of the nose and paranasal sinuses for more than 12 weeks. Computed Tomography (CT scan) of the paranasal sinuses is the gold standard for diagnosing chronic rhinosinusitis. Nasal septal deviation and bullous concha are anatomical variation that often found in CT scan of chronic rhinosinusitis patients. The seve…