【摘要】 目的:探讨颅内巨大表皮样囊肿的MR影像表现,分析磁共振在颅内巨大表皮样囊肿诊断和鉴别诊断价值。材料与方法:分析15例手术病理证实为颅内巨大表皮样囊肿的MR影像表现及术前做T1W、T2WI的MR常规平扫、T2-FLAIR、DWI和增强MRI影像表现。结果:14例T1WI呈低信号,只有1例T1WI呈高信号,T1-STIR未能抑制。所有病例T2WI呈高信号,稍高于脑脊液。所有病例T2-FLAIR囊内见不同数量的絮状稍高信号影。DWI均表现为明显高信号,信号不均匀。增强多无强化或囊壁轻度强化,其中3例发生恶性变者局部囊壁呈结节状明显强化。结论:颅内巨大表皮样囊肿MR表现具有明显的特征性,对本病的诊断与鉴别诊断具有价值。T2-FLAIR信号对于诊断最具有特征性,颅内巨大表皮样囊肿病灶检出方面,DWI均优于MRI平扫以及T2-FLAIR。增强扫描有利于病变良恶性鉴别。更多还原

【Abstract】 Purpose: To evaluate the MR imaging manifestations of encranial tremendous epidermoid cyst,to analyze the MR valuable method for diagnosis and differential diagnosis of encranial tremendous epidermoid cyst. Purpose: 15 cases with histologically proved encranial tremendous epidermoid cyst were analyze the MR imaging manifestations,and performed with T1W、T2WI MRI routine scan,T2-FLAIR,DWI and. T1 WI Gd-DTPA enhancement. Results: Among these cases,15 cases were hypointensity on T1 WI and fat-suppression T1 WI were included in 1 case with hyperintensity in the mass. All of the cases were hyperintensity On T2 WI. On T2-FLAIR,All of the cases cases were hyperintensity,All of them were hyperintensity on DWI,homogeneous or heterogeneous. All of them appeared no-enhancement or wild enhancement,except 3 case with malignant transformation shown as tuberculous-enhancement. Conclusion: MR was a valuable method for the diagnosis and differential diagnosis of encranial tremendous epidermoid cyst. T2-FLAIR was characteristic. DWI,which is better than MRI routine scan and T2-FLAIR in the detection of leisions and speciality of sign,is the first choice for canning.Enhancement was propitious to the differential diagnosis of benign and malignant.更多还原