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MRI features of dysembryoplastic neuroepithelial tumor
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF RADIOLOGY
- Issue:
- 5
- DOI:
- 10.3760/j.issn:1005-1201.2006.05.004
- Key Word:
- 神经外胚瘤,原始;磁共振成像
Abstract： 目的探讨胚胎发育不良性神经上皮瘤(DNT)的MRI表现特征.方法对经手术病理证实的6例DNT的MRI材料进行回顾性分析,总结DNT的MRI表现特征.结果 6例患者的肿瘤均局限于皮层或以皮层为主,呈三角形假囊肿样,T1WI呈低信号,T2WI呈高信号;T2水抑制像上边缘和分隔呈高信号,其他部分呈等偏低信号;扩散加权像(DWI)上呈低或等偏低信号,表观扩散系数(ADC)图呈ADC值升高;MR波谱测定肿瘤胆碱(Cho)峰和肌酸(Cr)峰改变不明显,N-乙酰天门冬氨酸(NAA)较正常参照侧降低,但降低不明显;增强无强化;瘤体夹杂细条索状等信号分隔;无瘤周水肿,无占位效应;肿瘤邻近的颅骨内板发育不良.结论胚胎发育不良性神经上皮瘤MRI表现较具特征性,有助于术前正确诊断.
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