眼眶神经鞘瘤的影像学表现  

Imaging Findings in Orbital Neurilemmoma

作　　者：包兵[1] 钱雯[1] 宋济昌[1] 

机构地区：[1]复旦大学附属眼耳鼻喉科医院放射科,上海200031

出　　处：《中国眼耳鼻喉科杂志》2006年第6期360-361,I0005-I0006,共4页Chinese Journal of Ophthalmology and Otorhinolaryngology

摘　　要：目的分析眼眶神经鞘瘤的计算机体层摄影(computed tomography,CT)和磁共振成像(magneticresonance imaging,MRI)表现,并探讨其在诊断和鉴别诊断中的价值。方法回顾性分析经手术和病理证实34例眼眶神经鞘瘤,其中 CT 扫描26例,MRI 检查4例,CT 加 MRI 检查4例。结果 27例肿块位于肌锥内,7例位于肌锥外,多呈椭圆形和类圆形。CT 平扫为等密度,多数密度均匀,增强后不均匀强化。MRI 表现为肿瘤 T_1WI呈等或略低信号,T_2WI 呈中高信号,肿瘤囊变区 T_1WI 呈低信号,T_2WI 呈高信号,增强后瘤体实质部分呈均匀强化,而囊变部分不强化。结论 CT 与 MRI 均能显示眼眶内的肿块,MRI 对神经鞘瘤诊断及鉴别诊断的准确性优于 CT。Purpose To evaluate the diagnostic and differential diagnostic value of orbital neurilemmona by analyzing CT and MRI imaging.Methods The data of 34 patients with orbital neurilemmoma that were proved with pathology and surgery were analyzed retrospectively. All patients were scanned with CT and/or MRI before surgery , among which,26 with CT,4 with MRI ,and 4 with CT and MRI. Results The tumors were located within the orbit intraconal in 27 cases,outside the orbit extraconal in 7 cases . Most of the tumors showed an elliptic- or round-shaped mass. Lesions showed isodense on CT plain scans, most of them were homogenous, and enhanced heterogeneously after contrast enhancement. On MRI, the lesions appeared low or isodense signal intensity on T1-weighted image（T1WI）,and moderate or high signal intensity on T2-weighted image（T2WI） ,the cystic regions of lesions appeared low signal intensity on T1WI and high signal intensity on T2WI. After contrast, matter part of lesions showed homogenous enhancement and cystic part showed no enhancement. Conclusion Both of CT and MRI imaging can show intraocular lesions of the tumor. MRI is more helpful in diagnosis and differential diagnosis of neurilemmoma than CT.

关 键 词：眼眶 神经鞘瘤 体层摄影术 X线计算机 磁共振成像 

分 类 号：R739.7[医药卫生—肿瘤]