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To evaluate the incidence of anatomical variations in sinonasal area by nasal endoscopy and CT scan paranasal sinuses and to correlate the anatomical variations in sinonasal area with extent of disease. The present study was conducted on 40 patients of chronic sinusitis. All the patients underwent CT scan paranasal sinus axial and coronal view and nasal endoscopy. The most common anatomical variations were agger nasi cells (80 %), deviated nasal septum (72.5 %) and concha bullosa (47.5 %). Other anatomical variations seen in sinonasal region were uncinate process variations, paradoxical middle turbinate, haller cells, accessory ostia of maxillary sinus, multiseptated sphenoid. Osteomeatal unit (87.5 %) and maxillary sinuses (87.5 %) were the most commonly involved which was followed by anterior ethmoids (70 %), posterior ethmoids (50 %), frontal sinuses (32.5 %) and the sphenoids (20 %). Considering the results obtained, we believe that anatomical variations may increase the risk of sinus mucosal disease. We therefore, emphasize the importance of a careful evaluation of CT study in patients with persistent symptoms of chronic rhinosinusitis.

Sinonasal Anatomical Variants: CT and Endoscopy Study and Its Correlation with Extent of Disease