Computed Tomographic Analysis of Frontal Recess Cell Prevalence According to International Frontal Sinus Anatomy Classification

Öz

Objective: To examine the prevalence of frontal recess (FR) cells based on the International Frontal Sinus Anatomy Classification (IFAC) in healthy sinuses, as well as evaluate the interrater agreement of the IFAC system. Methods: Five hundred nine adult patients with non-diseased paranasal sinuses on computed tomography (CT) were retrospectively included in this study. Two researchers independently identified FR cells on 1018 sides using triplanar CT reconstructions. The prevalence of each cell type was assessed, and interobserver agreement was measured using the Kappa coefficient (κ). Results: In our population, the agger nasi cell (ANC) had the highest prevalence (88.0%), followed by supra bulla cell (43.0%), supra agger cell (SAC) (25.0%), frontal septal cell (22.0%), supraorbital ethmoid cell (17.1%), supra agger frontal cell (SAFC) (8.3%), and supra bulla frontal cell (SBFC) (7.1%). Bilateral incidence was highest for the ANC (80.4%) and lowest for the SBFC (2.2%). The prevalence of most IFAC cells was similar between males and females, except in SAC (27.8% in females vs. 22.2% in males) and SAFC (11.6% in males vs. 5.1% in females). FR cells that pneumatize into the frontal sinus were observed in 28.6% of cases, with a significantly higher prevalence in male patients compared to females. Excellent interrater agreement was found for all FR cells, with κ values ranging from 0.94 to 1.0. Conclusion: The prevalence of FR cells demonstrates variations specific to the population. Gender differences appear to influence the presence of cells pneumatizing into the frontal sinus. The IFAC is a reliable tool for identifying cells in the FR. Keywords: International frontal sinus anatomy classification, sinus anatomy, frontal cells, computed tomograpy

Anahtar Kelimeler

• International frontal sinus anatomy classification
• sinus anatomy
• frontal cells
• computed tomograpy

Uluslararası Frontal Sinüs Anatomi Sınıflamasına Göre Frontal Reses Hücre Prevalansının Bilgisayarlı Tomografik Analizi

Öz

Amaç: Sağlıklı paranazal sinüslerde frontal reses (FR) hücrelerinin prevalansını Uluslararası Frontal Sinüs Anatomisi Sınıflandırmasına (IFAC: International frontal sinus anatomy classification) dayalı olarak incelemek. Ayrıca, IFAC sisteminin gözlemciler arası uyumunu değerlendirmek. Yöntem: Bu çalışmaya bilgisayarlı tomografik görüntülemelerinde (BT) paranazal sinüsleri hastalık bulunmayan 509 yetişkin hasta retrospektif olarak dahil edildi. İki araştırmacı birbirinden bağımsız olarak üç düzlemli BT rekonstrüksiyonlarını kullanarak 1018 taraftaki FR hücrelerini tanımladı. Her hücre tipinin prevalansı değerlendirildi ve gözlemciler arası uyum Kappa katsayısı (κ) kullanılarak ölçüldü. Bulgular: Popülasyonumuzda, agger nasi hücresi (ANH) en yüksek prevalansa sahipti (%88,0), bunu supra bulla hücre (%43,0), supra agger hücre (SAH) (%25,0), frontal septal hücre (%22,0), supraorbital etmoid hücre (%17,1), supra agger frontal hücre (SAFH) (%8,3) ve supra bulla frontal hücre (SBFH) (%7,1) izledi. Bilateral insidans ANH için en yüksek (%80,4) ve SBFH için en düşük (%2,2) idi. SAH (kadınlarda %27,8; erkeklerde %22,2) ve SAFH (erkeklerde %11,6; kadınlarda %5,1) dışında diğer IFAC hücrelerinin prevalansı erkekler ve kadınlar arasında benzerdi. Vakaların %28,6'sında frontal sinüse pnömatize olan FR hücreleri gözlendi. Bu hücrelerin prevalansı erkek hastalarda kadınlara göre anlamlı derecede daha yüksekti. Tüm FR hücreleri için 0,94 ile 1,0 arasında değişen κ değerleri ile mükemmel bir gözlemciler arası uyum bulunmuştur. Sonuç: FR hücrelerinin prevalansı popülasyona özgü farklılıklar göstermektedir. Cinsiyet farklılıkları, frontal sinüse pnömatize olan hücrelerin varlığını etkiler. IFAC, FR'deki hücreleri tanımlamak için güvenilir bir araçtır. Anahtar Kelimeler: Uluslararası frontal sinüs anatomisi sınıflandırması, sinüs anatomisi, frontal hücreler, bilgisayarlı tomografi

Anahtar Kelimeler

• Uluslararası frontal sinüs anatomisi sınıflandırması
• sinüs anatomisi
• frontal hücreler
• bilgisayarlı tomografi

Kaynakça

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