General Peripheral Hospital, Nikea, Athens, Greece.
Clin Anat. 2010 May;23(4):370-3. doi: 10.1002/ca.20957.
Pneumatization of the crista galli is a recognized incidental finding on computed tomography (CT), usually with little relevance to the clinical picture. There are, however, notable exceptions: congenital midline nasal defects including nasal dermoids have been seen to track through or near the crista galli. Mucocele development has also been seen. This study aimed to evaluate the variation in crista galli morphology and pneumatization and assess whether specific morphologies occur. A retrospective observational study was undertaken between November 2007 and January 2008. Using coronal and axial reconstructed CT views, images of the head in the region of the paranasal sinuses were assessed. Variations in the crista galli were classified according to their position relative to the cribriform plate and to the degree of pneumatization. Computed tomography findings of the morphology of the crista galli in 99 patients were reviewed and a classification system derived from the findings. Three variations of the position of the base of the crista galli were defined. In 28.3% of subjects the base of the crista galli did not extend below the level of the cribriform plate. In 63.6%, the crista galli extended less than 50% of its height below the cribriform plate and in 8.1% of the scans the crista galli extended more than 50% of its height below the cribriform plate. Pneumatization was noticed in 14.1% of the scans. Our results demonstrate the variation that occurs in the morphology and pneumatization of the crista galli. We hope this knowledge might be of help in preoperative planning of surgical approaches to sites of disease involving the crista galli.
鸡冠部气腔化为计算机断层扫描（CT）上公认的偶然发现，通常与临床表现无明显关系。然而，也有显著的例外：先天性中线鼻部缺损，包括鼻部皮样囊肿，已被发现穿过或靠近鸡冠部。粘液囊肿的发展也已被发现。本研究旨在评估鸡冠部形态和气腔化的变化，并评估是否存在特定的形态。这是一项在 2007 年 11 月至 2008 年 1 月期间进行的回顾性观察研究。使用冠状位和轴位重建 CT 视图，评估鼻窦区域头部的图像。根据鸡冠部相对于筛板的位置及其气腔化程度对鸡冠部的变化进行分类。回顾了 99 例患者的 CT 发现，并从这些发现中得出了一种分类系统。定义了三种鸡冠部基部位置的变化。在 28.3%的研究对象中，鸡冠部基部未低于筛板水平。在 63.6%的情况下，鸡冠部向下延伸不到其高度的 50%低于筛板，而在 8.1%的扫描中，鸡冠部向下延伸超过其高度的 50%低于筛板。在 14.1%的扫描中发现了气腔化。我们的结果表明鸡冠部形态和气腔化存在变化。我们希望这些知识能有助于术前规划涉及鸡冠部的疾病的手术入路。
