Various studies have shown that Incidental maxillary sinus pathologies are observed in routine Cone-beam Computed tomography scans (CBCT) and anatomical variations in osteomeatal complex may be one of the predisposing factors. A cross-sectional observational study was carried out to determine the prevalence of anatomical variation of osteomeatal complex (OMC) in incidental maxillary sinus pathologies and the correlation of anatomic variations of OMC with maxillary sinus pathologies using Cone-beam Computed tomography (CBCT) images. 100 full volume CBCT scans obtained were retrospectively evaluated for maxillary sinus pathologies then the same scans were analyzed for anatomical variations of OMC. Data was subjected to analysis. Results show that prevalence of variation in the uncinate process, concha bullosa, ethmoid bulla, Haller cells and agger nassi cells, were found to be statistically significant (p<0.05). Correlation between maxillary sinus pathology with variations in uncinate process (p=0.001), ethmoid bulla (p=0.05) and agger nassi cells (p=0.009) were significant.
