颅内不典型表皮样囊肿的MRI表现

发布时间：2019-01-09 09:28

【摘要】：目的探讨MRI对颅内不典型表皮样囊肿的诊断价值。方法搜集26例经手术病理证实的不典型表皮样囊肿患者MRI T1WI、T2WI、扩散加权成像(DWI)及增强检查资料,分析其部位、形态及信号特点。结果 11例表皮样囊肿位于脑室内,12例位于脑实质内,2例位于硬膜外,1例位于大脑纵裂前部。呈类圆形、不规则或分叶状,周围均无水肿。脑室内、大脑纵裂肿瘤信号呈均匀或不均匀长T1、长T2信号;脑实质内、硬膜外肿瘤信号复杂多样,T1WI、T2WI呈混杂信号,可见T1WI高信号,或T2WI低信号。DWI均呈明显高信号。增强扫描4例囊壁强化。结论 DWI结合T1WI、T2WI及增强扫描对颅内不典型表皮样囊肿的诊断及鉴别诊断有重要价值。
[Abstract]:Objective to evaluate the diagnostic value of MRI in intracranial atypical epidermoid cysts. Methods 26 cases of atypical epidermoid cysts confirmed by operation and pathology were collected. The data of MRI T 1WI T 2WI, diffusion weighted imaging (DWI) and contrast enhancement were collected, and their location, morphology and signal characteristics were analyzed. Results 11 cases of epidermoid cysts were located in the ventricle, 12 cases in the cerebral parenchyma, 2 cases in the epidural area, and 1 case in the anterior part of the longitudinal fissure of the brain. It was round, irregular or lobulated, and there was no edema around it. In the ventricle, the signal intensity of the longitudinal fissure tumor was homogeneous or uneven with long T 1 and long T 2 signal. In the brain parenchyma, the signal intensity of epidural tumor was complex and varied. The signal intensity of T1WI T2WI was mixed, T1WI was high signal, or T2WI signal was low. DWI was obviously high signal intensity. Enhancement scanning was performed in 4 cases with cystic wall enhancement. Conclusion DWI combined with T _ 1WI T _ 2WI and contrast-enhanced scanning have important value in the diagnosis and differential diagnosis of intracranial atypical epidermoid cysts.
【作者单位】：内蒙古医科大学第一附属医院影像科;
【分类号】：R739.4;R445.2

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