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颅内表皮样囊肿的MRI表现 被引量:2

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摘要 目的研究颅内表皮囊肿的MRI影像特征。方法经手术病理证实的表皮样囊肿患者16例,全部行MR检查。结果典型表现者12例(75%),T1WI上表现为低信号,有时不均匀,T2WI上表现为高信号或高等低混杂信号,非典型表现者4例(25%,T1WI上表现为短T1的高信号。T2WI上表现为高等低混杂信号。16例均行增强扫描。9例肿瘤无强化,6例边缘强化,1例呈肿瘤周边及内部条索样强化。结论典型常见的表皮样囊肿呈T1低信号,有时欠均匀,T2高信号或高等低混杂信号。非典型表皮样囊肿呈T1高信号,T2高等低混杂信号。信号形成的原因是高浓度蛋白质所致,并非脂类物质。
作者 郭平珍 张悦
出处 《河北医科大学学报》 CAS 2004年第z1期17-18,共2页 Journal of Hebei Medical University
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