ABSTRACT
Deviated Nasal Septum [DNS] is considered as one of the risk factors affecting the osteomeatal complex. Some authors considered that middle turbinate changes especially concha bullosa a fixed coincident event with septal deviation. This study aims at assessment of the concomitant variations and changes in the Osteomeatal Unit [OMU] and its adjacent structures with septal deviation. One hundred and nineteen adult cases with DNS and chronic sinusitis were submitted to C.T imaging. The angle of septal deviation was measured in each case and the data were correlated with changes of OMU, middle turbinate, bulla ethmoidalis and Uncinate Process [UP]. All data were tabulated and analyzed. Our results showed significant increase incidence of anatomical and pathological changes in OMU, middle turbinate, bulla ethmoidalis and UP with severe septal deviation. It can be concluded that attention has to be directed to high septal deviation as well as obstructing low deviation and C.T. imaging is highly indicated in those patients to assess the concurrent changes at the level of middle turbinate and OMU. The septal deviation and the concurrent structural changes could be the cause of persistent and recurrent sinusitis