Abstract
Diseases of the paranasal sinuses (PNS) associated with various anatomical and inflammatory changes. Computerized tomography (CT) plays effective role for assessment and characterization of PNS pathologies. The aim of this study is to characterize PNS diseases using computed tomography(CT) in Saudi patients. A retrospective study included 65 patients diagnosed clinically with nasal cavity disorders and PNS diseases that referred to the radiology department at the university medical center (UMC), University of Hail. They were examined with 64-slice MDCT using CT protocol of paranasal sinuses. The study was conducted at the period of August 2017 to October 2019.The majority of PNS pathologies affected patients in the 2 nd decade (41.5%). Maxillary sinuses were the most affected sinuses. The most common findings were 86.15% nasal septal deviation, enlarged nasal conchae were 47.69%, mucosal thickening was 40%, retention cysts were 10.76%, and 3.07% polyps. CT had 98.41% sensitivity and 97.01% accuracy in characterizing PNS pathologies .CT is an accurate and sensitive imaging modality for evaluating the PNS diseases. Nasal septal deviation, enlarged nasal conchae, and mucosal thickening were the most common findings associated with PNS diseases.