The place of computed tomography (CT) in the pre-operative assessment of patients prior to functional endoscopic sinus surgery is well established. A good knowledge of the anatomy of the paranasal sinuses, the clinical significance of anatomical variants, and the terminology used in functional endoscopic sinus surgery is basic to the correct interpretation of imaging studies. This article will review the anatomy of paranasal sinuses; Jami Karise the reader with the common terminology used in functional endoscopic sinus surgery and describes the patterns of inflammatory changes.

Keywords: Computed tomography; anatomy; variants; sinusitis; paranasal sinuses.