【摘要】 目的:分析三叉神经鞘瘤的生长部位、MRI表现及其影像特征,以提高其诊断准确性。方法:回顾性分析经手术病理证实的三叉神经鞘瘤8例,分析MRI平扫及增强扫描结果并与病理作对照分析。结果:8例三叉神经鞘瘤中,左侧3例,右侧5例。3例呈椭圆形生长于中颅窝,5例跨颅窝生长,呈哑铃型。6例突入颞下窝。2例实性病变伴有囊变,6例基本为实性。肿瘤实性部分在T2加权像呈"椒盐"样改变,增强扫描其实性部分明显强化。结论:三叉神经鞘瘤的生长部位、肿瘤的形态及信号特征对于诊断有一定的参考价值。更多还原

【Abstract】 Objective:MRI appearance and imaging characteristics were analyzed in order to improve the diagnosis of intracranial trigeminal neurinoma.Methods:8 cases of intracranial trigeminal neurinoma,which were confirmed by surgical pathology,underwent routine MRI scanning and enhanced scanning before operation.Their MRI images were reviewed and compared with the surgical pathology.Results:Among 8 cases,3 lesions were located in the left,while the other five,in the right.The tumors grew in the middle cranial fossa with oval shape in 3 cases,and 5 cases across the middle and posterior cranial fossa with dumbbell appearance.There were six cases whose trigeminal neurinoma intruded into the infratemporal fossa.Except the pathology of two cases contained some cystic changes,the other six cases exhibited basically solid mass.The solid part of trigeminal neurinoma presented "peper salt" appearance in T2 weighted image and an obvious enhancement after enhanced scanning.Conclusion:It is very valuable to make a correct diagnosis for trigeminal neurinoma by analyzing its anatomic site,morphology,and signal characteristics.更多还原