Background: The nasal septal body (NSB) is a dilated section of the anterior nasal septum that is situated anterior to the middle turbinate and around 0.7e1.5 cm above the nasal floor. Aim: This study analyses the measures taken from patients without sinonasal polyposis in order to identify the structural alterations in the NSB among patients with sinonasal polyposis. Patients and methods: This retrospective study was conducted between April 2021 and February 2022 involving a review of paranasal sinus computed tomography (PNS CT) scan among patients with sinonasal polyposis and without sinonasal disease. The anterior part (A) was measured anterior and superior to the inferior turbinate; the middle or widest (M) part was measured anterior to the middle turbinate and superior to the inferior turbinate; and the posterior (P) part was measured within the anterior 1/3 of the middle turbinate but not beyond the crista galli. The study has been conducted over two groups, group A: study group of 200 patient (146 male and 54 female) according to inclusion and exclusion criteria, group B: control group of 50 volunteers (17 male and 33 female) without any clinical and radiological findings related to PNS disease. Results: The mean A part was statistically significant higher in group A than that in group B (5.34 ± 0.93 Vs. 3.44 ± 0.60, P < 0.001), the mean M part was statistically significant higher in group A than that in group B (13 ± 1.9 Vs 9.91 ± 0.90, P < 0.001), the mean P part was statistically significant higher in group A than that in group B (5.54 ± 1.09 Vs. 3.95 ± 0.63, P < 0.001), the mean P part of septum was statistically significant higher in group A than that in group B (3.26 ± 0.89 Vs. 2.22 ± 0.76, P < 0.001) Conclusion: There was statistically significant positive correlation between A part, M part, P part and P part of septum. There was statistically significant negative correlation between P part of septum and age while there was nonstatistically significant correlation between A part, M part, P part and age