This study is a prospective cross sectional, which includes 85 patients suffering from sinusitis for twelve weeks or more who have been evaluated by endoscopic nasal examination and CT scan for anatomical variations and their distribution in patients suffering from chronic rhinosinusitis. Among the variations noted the maximum is  determined to be deviated nasal septum (DNS) 88.2 % followed with concha bullosa  76.4%, followed by paradoxical center turbinate 9%, agger nasi 7%.

Keywords: Anatomical variations, Paranasal sinuses, Sinusitis, Computed tomography.

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Ashokan

Postgraduate, Department of ENT, Rajah Muthiah Medical College & Hospital, Annamalai University