Correlations between anatomical variations of the nasal cavity and ethmoidal sinuses on cone-beam computed tomography scans

Abstract

Purpose Anatomical variations of the external nasal wall are highly important, since they play a role in obstruction or drainage of the ostiomeatal complex and ventilation and can consequently elevate the risk of pathological sinus conditions. This study aimed to assess anatomical variations of the nasal cavity and ethmoidal sinuses and their correlations on cone-beam computed tomography (CBCT) scans. Materials and Methods This cross-sectional study evaluated CBCT scans of 250 patients, including 107 males and 143 females, to determine the prevalence of anatomical variations of the nasal cavity and ethmoidal sinuses. All images were taken using a New Tom 3G scanner. Data were analyzed using the chi-square test, Kruskal-Wallis test, and the Mann-Whitney test. Results The most common anatomical variations were found to be nasal septal deviation (90.4%), agger nasi air cell (53.6%), superior orbital cell (47.6%), pneumatized nasal septum (40%), and Onodi air cell (37.2%). Correlations were found between nasal septal deviation and the presence of a pneumatized nasal septum, nasal spur, and Haller cell. No significant associations were noted between the age or sex of patients and the presence of anatomical variations ( P >0.05). Conclusion Radiologists and surgeons must pay close attention to the anatomical variations of the sinonasal region in the preoperative assessment to prevent perioperative complications.

Assessing the Clinical Value of Performing CT Scan before Rhinoplasty Surgery

“…The prevalence of concha bullosa and deviated septum was 67.3% and 49.5%, respectively, in this study and correlated to the present study (57.69% and 53.84%, respectively). Similar findings were observed in the study of Shokri et al [ 27 ] on the prevalence of anatomical variations of the nasal cavity on CBCT. In Schell et al's study [ 28 ], dual-source CT was used to evaluate paranasal sinus and facial skull with comparable results to conventional CT.…”

Radiologic analysis of correlations between sinonasal anatomical variations in patients with nasal septal deviation

“…In order to prevent vital complications that may occur during transsphenoidal and skull base surgery, it is essential to identify anatomic variations associated with the SS preoperatively. Removal of the ACPP during skull base surgery carries the risk of cerebrospinal fluid rhinorrhea and associated sepsis (Nandapalan et al, 1996;Sirikci et al, 2000). Prior to skull base surgery, the risk of this complication is reduced by identifying ACPP in paranasal CT and preferring extradural approach (Noguchi et al, 2005).…”

Nasal cavities and the nasal septum: Anatomical variants and assessment of features with computed tomography

“…The incidence of septum deviation ranges from 14.1% 14 to 90.4%. 15 Septal deformities are far more common than a nondeviated septum. 16 In a study of 594 maxillary sinus CT scans, left-sided deviations were observed more frequently than rightsided ones (43.9% vs. 36.4%).…”

“…The incidence of septum deviation ranges from 14.1% 14 to 90.4%. 15 Septal deformities are far more common than a non-deviated septum. 16…”