胚胎发育不良性神经上皮瘤的MRI特征分析  

Analysis of MRI features of dysembryoplastic neuroepithelial tumor

作　　者：于爱红[1] 陈莉[2] 李勇杰[1] 张国君[1] 李坤成[3] 王玉平[4] 

机构地区：[1]首都医科大学宣武医院北京功能神经外科研究所,北京100053 [2]首都医科大学宣武医院病理科,北京100053 [3]首都医科大学宣武医院医学影像学部放射科,北京100053 [4]首都医科大学宣武医院神经内科,北京100053

出　　处：《医学影像学杂志》2008年第9期969-972,共4页Journal of Medical Imaging

摘　　要：目的:探讨胚胎发育不良性神经上皮瘤(DNT)的MRI表现,分析其影像学特征。方法:对经手术病理证实的13例DNT的MRI材料进行回顾性分析。结果:MR检查病变均位于幕上结构,主要病灶累及皮层,其中颞叶9例,额叶3例,颞枕叶交界1例。病变在MRI均呈T1WI等低信号,T2WI高信号。FLAIR像呈等-高混杂信号,9例FLAIR像内见高信号"环征"及分隔。8例边界清晰;13例病变均无明显瘤周水肿,11例无明显占位效应。9例增强病例中5例无强化,4例明显结节状、中心环状或斑片状强化。结论:DNT的MRI表现较具特征性,MRI有助于术前正确诊断。Objective：To investigate the MRI findings of dysembryoplastie neuroepithelial tumor（DNT） and to analyze the imaging features of DNT. Methods： The MR images of 13 cases with surgically and pathologically proved DNT were retrospectively reviewed. Remalts：All eases were located in the super- tentorial gray matter. Cortex was the main involved area. Of these, nine eases were located in the temporal lobes, three cases in the frontal lobe, and one ease in the boundary of temporal-occipital lobe. All eases had decreased signal intensity on T1-weighted MR images and increased signal intensity on T2-weighted images. On fluid attenuated inversion recovery weighted images, the hyperintense ＂ring sign＂ and septa of the lesion were seen in 9 cases. Eight eases with well demarcated border were detected. Peritumoral edema was not found in all cases. No mass effect was found in 11 eases. Contrast enhancement exam was performed in 9 eases. Contrast enhancement was absent in five cases, and four eases showed significant enhancement. Conelusion：MRI findings of DNT are characteristic. MRI teclmique is help to make correct presurgieal diagnosis.

关 键 词：癫痫 神经外胚瘤 原始 磁共振成像 

分 类 号：R739.41[医药卫生—肿瘤] R445.2[医药卫生—临床医学]