Asal, NeşeMuluk, Nuray Bayarİnal, MikailŞahan, Mehmet HamdiDoğan, AdilArıkan, Osman Kürşat2020-06-252020-06-252019closedAccess1049-22751536-3732https://doi.org/10.1097/SCS.0000000000005848https://hdl.handle.net/20.500.12587/7686Objectives: The authors investigated the olfactory fossa (OF) in patients with unilateral nasal septal deviation (NSD) and presented the lateral lamella-cribriform plate angle (LLCPA). Methods: Paranasal sinus computed tomography images of 300 adult subjects with unilateral NSD (111 males, 189 females) were evaluated retrospectively. Septal deviation angle (SDA), Keros Classification, OF depth and width, LLCPA; and orbital plate and cribriform plate (OPCP) distance were measured. Results: The OF depth values (ipsilateral, contralateral) were found as Keros III >Keros II >Keros I (P-adjusted<0.0175). The OF width values (ipsilateral) were detected as Keros I >Keros II and Keros I >Keros III (P-adjusted<0.0175). In patients with higher SDA values, ipsilateral OF depth values decreased (P<0.05). The LLCPA and OPCP values were higher in Keros I and lower in Keros III (P<0.05). Conclusion: In patients with lower LLCPA and OPCP, endoscopic sinus surgery will be more dangerous for trauma to lateral lamella and intracranial penetration.eninfo:eu-repo/semantics/closedAccessKeros classificationlateral lamella-cribriform plate angleolfactory fossa deptholfactory fossa widthorbital plate and cribriform plate distanceArticle3061911191410.1097/SCS.00000000000058482-s2.0-8507142166131343591Q3WOS:000500024900111Q4