颈部神经源肿瘤的CT诊断

目的：探讨ＣＴ扫描对颈部神经源肿瘤的定位、定性诊断价值。材料与方法：复习经手术及病理证实的颈部神经源肿瘤的ＣＴ扫描３０例，包括神经鞘瘤１７例，神经纤维瘤６例，颈动脉体瘤３例，恶性神经源肿瘤４例。结果：肿瘤位于颈动脉间隙１５例，椎旁间隙９例，其他部位６例。颈动脉间隙肿物中，８例（５３．３％）使颈动、静脉向外侧移位，２例（１３．３％）使血管向前方移位，５例（３３．３％）使颈动、静脉分离（其中４例明确来

CT Diagnosis of the Cervical Neurogenic Tumors

Objective: To study the ability of CT for the localization and characterization of cervical neurogenic tumor. Materials and Methods: CT scans of 30 cases of the cervical neurogenic tumor proved by surgery and pathology were reviewed, which included schwannoma ( n= 17), neurofibroma ( n= 6), carotid body tumor ( n= 3) and malignant neurogenic tumor ( n= 4). Results: The location of the tumors were: carotid space (WT5BXn= 15, 16 lesions), paraspinal space ( n= 9), miscellaneous ( n= 6). Of the tumors located in the carotid space, there were lateral displacement of the carotid artery (CA) and internal jugular vein (IJV) in 8 cases (53.3%), anterior displacement of the vessels in 2 cases (13.3%). The CA and IJV were separated apart in 5 cases (33.3%), of which, 4 tumors originated from vagus nerve. Anteriorand lateral displacement of the anterior scalenus muscle were shown in all of the 9 tumors located in the paravertebral space, enlargement of the vertebral foramen was found in 2 cases. 88.2% of the 17 cases of the schwannoma had the density lower than that of cervical muscles. All of the schwannomas were heterogeneous in density, which were central insular speckled high attenuation area surrounded by a low attenuation rim (35.3%) or vice versa (23.5%), salt and pepper alike mixed attenuation (41.2%). Conclusion: Contrast enhanced CT is very helpful in the diagnosis of cervical neurogenic tumor, the most valuable diagnostic parameters included location of the tumor, relationship between the tumor and the adjacent great vessels as well as the density of the tumor.