Nakada Tomoaki, Kikuta Shu, Mori Harushi, Shimizu Yuya, Nishijima Hironobu, Kondo Kenji, Yamasoba Tatsuya
Department of Otolaryngology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan.
Department of Radiology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan.
ORL J Otorhinolaryngol Relat Spec. 2018;80(1):41-50. doi: 10.1159/000487240. Epub 2018 Apr 17.
On computed tomography (CT), sinonasal schwannoma displays as a soft-tissue mass without any distinctive features. Our aim was to define the radiological criteria for distinguishing schwannoma from other sinonasal benign tumours.
We retrospectively identified consecutive patients who were pathologically diagnosed with benign sinonasal tumours between 2007 and 2016. CT attenuation values were compared between benign tumours and the brainstem. The utilities of demographic factors, clinical factors, and CT parameters for predicting the CT attenuation values of the brainstem were analysed by univariate and multivariate regression.
Of the 111 identified cases of benign tumours, the CT attenuation values of tumours and the brainstem were analysed in 36 cases (schwannoma, 4 cases; inverted papilloma, 26; juvenile nasopharyngeal angiofibroma, 3; cavernous haemangioma, 3). The CT attenuation values of the schwannomas were significantly lower than in the brainstem, while those of the other tumours were significantly higher than in the brainstem. No factors affected the CT attenuation values of the brainstem.
Low CT attenuation values of sinonasal benign tumours relative to the brainstem could distinguish schwannomas from other benign tumours.
在计算机断层扫描（CT）上，鼻窦神经鞘瘤表现为软组织肿块，无任何特征性表现。我们的目的是确定将神经鞘瘤与其他鼻窦良性肿瘤区分开来的放射学标准。
我们回顾性地确定了2007年至2016年间经病理诊断为鼻窦良性肿瘤的连续患者。比较良性肿瘤与脑干之间的CT衰减值。通过单因素和多因素回归分析人口统计学因素、临床因素和CT参数对预测脑干CT衰减值的作用。
在111例确诊的良性肿瘤病例中，对36例病例（神经鞘瘤4例；内翻性乳头状瘤26例；青少年鼻咽血管纤维瘤3例；海绵状血管瘤3例）的肿瘤和脑干的CT衰减值进行了分析。神经鞘瘤的CT衰减值显著低于脑干，而其他肿瘤的CT衰减值显著高于脑干。没有因素影响脑干的CT衰减值。
鼻窦良性肿瘤相对于脑干的低CT衰减值可将神经鞘瘤与其他良性肿瘤区分开来。
