纵隔神经源性肿瘤MRI的诊断价值

发布时间：2018-01-05 09:48

本文关键词：纵隔神经源性肿瘤MRI的诊断价值　出处：《中国临床医学影像杂志》2017年02期 　论文类型：期刊论文

【摘要】：目的:分析纵隔神经源性肿瘤的MRI平扫信号特点及强化特征,以加强对该病的认识和诊断准确性。方法:经手术病理证实为纵隔神经源性肿瘤33例,分别行MRI自旋回波T_1WI、快速自旋回波T_2WI以及屏气扰相梯度回波T_1WI动态增强扫描,回顾性分析MRI扫描结果。结果:33例纵隔神经源性肿瘤中,神经鞘瘤18例,神经节细胞瘤7例,神经纤维瘤5例,副神经节瘤3例。肿块边界清楚,多呈圆形或椭圆形,MRI扫描T_1WI呈均匀低信号,神经纤维瘤T_2WI呈稍高信号,其余神经源性肿瘤T_2WI多呈不均匀高信号;动态增强扫描神经鞘瘤10例动脉期不均匀轻度强化,静脉期、延时期呈不均匀延时明显强化,3例动脉期不均匀明显强化,静脉期、延时期呈持续性明显强化。神经纤维瘤动脉期均匀轻度强化,静脉期、延时期呈均匀延时明显强化。神经节细胞瘤呈轻、中度延时均匀强化。副神经节瘤动脉期明显不均匀强化,静脉期、延时期呈低强化。结论:纵隔神经源性肿瘤的MRI征象具有一定特点,有助于大多数病例术前正确诊断。
[Abstract]:Objective: to analyze the features of MRI signal and enhancement of mediastinal neurogenic tumors in order to enhance the recognition and accuracy of diagnosis. Methods: 33 cases of mediastinal neurogenic tumors proved by operation and pathology were proved to be mediastinal neurogenic tumors. MRI spin echo T _ 1WI, fast spin echo T _ 2WI and breath-holding phase gradient echo T _ 1WI were performed respectively. Results among 33 cases of mediastinal neurogenic tumors, 18 cases were schwannoma, 7 cases were ganglionoma, 5 cases were neurofibroma and 3 cases were paraganglioma. Most of them showed round or oval MRI scan with homogeneous low signal on T _ 1WI, slightly hyperintense on T _ 2WI on T _ 2WI of neurofibroma, and uneven hyperintensity on T _ 2WI on other neurogenic tumors. Dynamic contrast-enhanced scanning was performed in 10 patients with neurilemmoma. The arterial phase was slightly enhanced, the venous phase was significantly delayed, and the arterial phase was significantly enhanced in 3 cases, and the venous phase was significantly enhanced in 3 cases. The enhancement of neurofibroma in arterial phase was even and slight, while that in venous phase was obviously enhanced in even delay, while in ganglionoma was light. Moderate delayed homogeneous enhancement. The arterial phase of paraganglioma was significantly uneven enhancement, venous phase, extension phase showed low enhancement. Conclusion: the MRI signs of mediastinal neurogenic tumors have certain characteristics. It is helpful for the correct diagnosis of most cases before operation.
【作者单位】：大连大学附属中山医院放射科;复旦大学附属中山医院放射科;
【分类号】：R734.5;R445.2
【正文快照】： 神经源性肿瘤几乎90%发生于后纵隔,是常见的纵隔原发性肿瘤之一[1]。临床症状不具特异性,主要通过影像学检查发现,随着MRI在纵隔病变诊断中的应用越来越广泛,其良好的软组织分辨率在肿瘤性病变的诊断中具有独特的优势。本研究拟对经手术病理证实的33例纵隔神经源性肿瘤的MRI表

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