Abstract
目的 探讨胚胎发育不良性神经上皮瘤(DNT)的MRI、CT表现及临床病理特征.方法回顾性分析经组织病理学证实的12例DNT的MRI、CT表现与临床病理特点.结果男6例,女6例,年龄12～68岁(平均36.7岁).大多数病例以癫痫小发作为主,神经系统检查无阳性体征.MR检查病变均位于幕上结构,累及皮层,额叶(4例)及颞叶(3例)为主;最大径2～5 cm不等,形态呈类圆形、分叶状或不规则状;2例累及白质, 7例伴囊性变.病变在MRI均呈T1WI低信号,T2WI高信号,无病变周围水肿及占位效应;囊性病变在T1WI信号均匀,等于或略高于脑脊液.6例CT扫描病变均呈低密度改变,其中2例呈囊性分叶状,1例呈局灶性钙化;4例增强后病变无强化,1例病变内呈轻度不均匀强化.病理组织学DNT分为3型:单纯型(4例)、复杂型(6例)及非特异型(2例).结论 DNT是一种良性病变,MRI较CT更具特征性表现。
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