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目的 研究眼眶神经鞘瘤的MRI表现特征 ,提出对眼眶神经鞘瘤诊断与鉴别诊断的依据。方法 对 2 3例经手术病理证实的眼眶神经鞘瘤患者分别行MRI矢状位、横轴位、冠状位的TSE序列T1加权、T2 加权扫描 ,平扫不压脂 ,增强扫描均压脂。结果 14例位于肌锥内 ;5例位于肌锥外 ,均呈边缘清楚锐利的椭圆形或长条状 ;4例位于眼眶与海绵窦 ,呈哑铃形 ,跨眶尖 ,为颅眶沟通性神经鞘瘤。结论 MRI的三维立体扫描能准确地显示肿瘤的位置、形态、大小、内部结构、与邻近组织关系以及增强表现 ,并能作出定位、定性诊断 相似文献
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椎管内神经鞘瘤多位于髓外硬膜下,占成人髓外硬膜下肿瘤的25%。MR I对术前定性、定位及制定手术方案具有非常重要作用。本文回顾性分析10例椎管内神经鞘瘤的MR I平扫及增强表现,探讨MR I对椎管内神经鞘瘤的诊断价值,以提高定性诊断的准确性。1材料与方法经过本院2002年2月至200 相似文献
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Seven cases of retroperitoneal neurilemoma confirmed by histology had an ultrasound examination. There were 5 women and 2 men with a mean age of 55. Most of the cases (5/7) had a palpable mass clinically. Of the 7 cases, 4 had a mass with cystic degeneration and internal echoes on sonogram, consistent with the macroscopic findings of tumors. The internal echoes represented blood clots and residual tissue (or septa) in cyst. Or the remaining 3 cases, one showed a confluent lobulated mass, the second had a solitary homogeneous mass with small cysts, and the third one, which was the smallest (4 cm × 4 cm × 6 cm), had a hypoechoic and homogeneous pattern. The sonograms of all 7 cases were consistent with the macroscopic features of the tumors. The sonographic pattern of tumor parenchyma is either homogenously hyperechoic or hypoechoic. Because of the cystic degeneration, hemorrhage, and residual tissue of retroperitoneal neurilemoma, the sonographic pattern was variable. © 1993 John Wiley & Sons, Inc. 相似文献
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高频彩超诊断外周神经源性良性肿瘤 总被引:2,自引:0,他引:2
目的:探讨高频彩超对外周神经源性良性肿瘤的临床诊断价值。方法:回顾分析12例经手术和病理证实的外周神经源性良性肿瘤特征性声像图表现。结果:在12例外周神经良性肿瘤中,神经鞘瘤9例,神经纤维瘤3例。声像图表现以纺锤形或椭圆形为主,界清,为实质低回声,多数有包膜,内部及周边均可见有动脉血流。特征性表现是多数病例肿瘤两端与神经干连接。结论:外周神经系统良性肿瘤具有一定的特征性声像图表现,而高频彩色超声可以清晰的观察到肿瘤与神经干的连接关系,使其成为该类肿瘤的首选检查方法。 相似文献
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