RT Journal Article SR Electronic T1 Frequency of the frontal sinus aplasia among Saudi Arabian population. A single-center retrospective case review JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 228 OP 231 DO 10.15537/smj.2021.2.25617 VO 42 IS 2 A1 Kholood S. Assiri A1 Ahmad S. Alroqi YR 2021 UL http://smj.org.sa/content/42/2/228.abstract AB Objectives: To assess the frequency of frontal sinus aplasia using computed tomography (CT) of the paranasal sinus among Saudi Arabian population.Methods: A retrospective case review of medical records from January 2019 to December 2019 in the Otorhinolaryngology Department, King Abdulaziz University, Riyadh, Saudi Arabia.Results: A total of 449 cases were reviewed. The incidence of bilateral frontal sinus aplasia was 3.3%. The incidence of right sinus agenesis was 5.12% and left was 1.33%. The mean age of reviewed patients was 39.15 years.Conclusion: The frequency of frontal sinus aplasia is low; however, this must be considered before surgical operations related to the sinuses.