Sjogren Phayvanh P, Waghela Rajendra, Ashby Shaelene, Wiggins Richard H, Orlandi Richard R, Alt Jeremiah A
Am J Rhinol Allergy. 2017 May 1;31(3):174-176. doi: 10.2500/ajra.2017.31.4428.
The International Frontal Sinus Anatomy Classification (IFAC) was introduced to more accurately characterize ethmoid and frontal sinus pneumatization patterns. The prevalence of IFAC cells and their anatomic associations have not been described.
The goal was to examine the prevalence of IFAC cells and determine radiologic features associated with a low-lying anterior ethmoidal artery (LAEA).
Imaging of adult patients who underwent computed tomographies from January 2015 to March 2016 were retrospectively reviewed by using the IFAC classification. We also measured the distance from the skull base to the anterior ethmoidal artery (AEA), the height of the lateral lamella of the cribriform plate, and anterior-posterior diameter from the anterior wall of the frontal sinus to the skull base (APF). Patients with a history of sinus surgery, trauma, malignancy, or congenital anomaly were excluded. Statistical analysis was performed by using Pearson correlation coefficients and χ2 tests.
A total of 95 patients met the inclusion criteria. There was a significant association between supraorbital ethmoid cells and an LAEA (p < 0.001), with a significant effect size (φ = 0.276, p = 0.007). An inverse relationship was observed between Keros type I classification I and an LAEA (p < 0.001), with a significant effect size (φ = -0.414, p = 0.000). Significant associations were found between the AEA distance from the skull base and the cribriform lateral lamella height (R = 0.576, p < 0.001). In addition, there was a significant association between the AEA distance from the skull base and the APF (R = 0.497, p < 0.001).
The presence of a supraorbital ethmoid cell and a wide APF were associated with an LAEA. There was a significant relationship between Keros type I classification and the AEA adjacent to the skull base. Delineation of these anatomic relationships may be helpful during endoscopic sinus surgery to avoid complications.
引入国际额窦解剖分类（IFAC）以更准确地表征筛窦和额窦的气化模式。IFAC细胞的患病率及其解剖学关联尚未见描述。
目的是研究IFAC细胞的患病率，并确定与低位筛前动脉（LAEA）相关的放射学特征。
回顾性分析2015年1月至2016年3月接受计算机断层扫描的成年患者的影像资料，采用IFAC分类。我们还测量了从颅底到筛前动脉（AEA）的距离、筛板外侧板的高度以及从额窦前壁到颅底的前后径（APF）。排除有鼻窦手术、外伤、恶性肿瘤或先天性异常病史的患者。采用Pearson相关系数和χ2检验进行统计分析。
共有95例患者符合纳入标准。眶上筛窦细胞与LAEA之间存在显著关联（p < 0.001），效应量显著（φ = 0.276，p = 0.007）。观察到Keros I型分类与LAEA之间呈负相关（p < 0.001），效应量显著（φ = -0.414，p = 0.000）。发现从颅底到AEA的距离与筛板外侧板高度之间存在显著关联（R = 0.576，p < 0.001）。此外，从颅底到AEA的距离与APF之间存在显著关联（R = 0.497，p < 0.001）。
眶上筛窦细胞的存在和较宽的APF与LAEA相关。Keros I型分类与靠近颅底的AEA之间存在显著关系。明确这些解剖关系在内镜鼻窦手术中可能有助于避免并发症。
