Background: The frontal sinus is frequently regarded as the most difficult location to reach in functional endoscopic sinus surgery (FESS). There have been numerous reports of significant variations in the capacity, symmetry, and morphology of the frontal sinus. Aim of Study: this study aimed to look at the prevalence of frontal cells in Egyptians and their relationship to chronic frontal sinusitis using the International Frontal Sinus Anatomy Classification (IFAC). Material and Methods: This prospective cross-sectional study was conducted in ENT and Radiology Departments, Faculty of Medicine, Zagazig University. 60 cases underwent CTPNS were reviewed during the period from March 2022 to September 2022. High-resolution multislice CT scan was done for each patient. Results: Frontal sinusitis was present in 36.6% of cases and was absent in 63.4% of the studied cases. There was statistically significant difference between both frontal positive sinusitis and frontal negative sinusitis studied groups as regards supra agger cells where it was present in 18.2% of positive sinusitis cases. Conclusion: Despite having the lowest frequency, frontal sinusitis is highly correlated with both SOECs and SACs.