摘要
目的探讨颅骨表皮样囊肿（SEC）的CT及MRI特征。方法回顾性分析经手术病理证实的4例颅骨表皮样囊肿患者的CT及MRI表现。结果SEC的影像特征表现为：（1）CT显示颅骨火山口或扇贝样骨质缺损，周围骨质增生硬化，病灶内可出现脂性密度；（2）MRT1WI示肿瘤呈等、低信号，T2WI呈显著高信号，扩散加权成像（DWI）呈轻、中度高信号，表观扩散系数（ADC）图像病灶呈等、低信号氢质子MR波谱（^1H—MRS）肿瘤区出现乳酸（Lac）、氨基酸（AA）等波；（3）CT、MR增强扫描，病灶实质无强化。结论SEC的CT及MR／表现具有特征性，影像检查有助于其定性诊断。
Objective To study the CT and MR imaging features of skull epidermoid cyst. Methods CT and MR findings of 4 cases of pathologically proved skull epidermoid cyst were analyzed and correlated with operative and pathologic reports. Results CT and MR appearances of skull epidermoid cyst were as follows： （1）crater-form or scalloping deossificatiun with sclerotic border and fatty density focus was detected on CT. （2） The lesions were isointense to hypointense relative to normal white matter in T1-weighted image, prominent hyperintense in T2-weighted image, mild to moderate hyperintense in diffusion-weighted imaging （DWI）, and isointense to hypointense in apparent diffusion coefficient （ADC） map on MR. Proton MRS revealed lactate （Lac） peaks at 1.3 ppm and amino acids （AAs） at 0. 9 ppm. （3） No enhancement was found in substance region of all tumors on both enhanced CT and enhanced MR examinations. Conclusion CT and MR appearances of skull epidermoid cyst have unique features which are very helpful in the diagnosis of skull epidermoid cyst.
出处
《中华放射学杂志》
CAS
CSCD
北大核心
2007年第3期282-285,共4页
Chinese Journal of Radiology
关键词
表皮囊肿
颅骨肿瘤
磁共振成像
体层摄影术
X线计算机
Epidermal cyst
Skull neoplasms
Magnetic resonance imaging
Tomography, X- ray computed
