Objective:To investigate the MRI features of central neurocytoma (CNC). Methods:The MRI features of 14 cases with pathology proved CNC were retrospectively analyzed. All had plain and enhanced MRI. Results:The location of the lesions were at the lateral ventricle,adjacent to foramen of monro foramen and septum pellucidum (10 cases) ,8 cases of them were located at the anterior 2/3 of lateral ventricle,2 cases at the posterior 2/3 of the lateral ventricle;2 cases had the tumor protruded into the third ventricle,all accompanied with dilation of bilateral lateral ventricle,which was much obvious in the homolateral ventricle. All lesions showed solid cystic components on MRI,the solid components showed iso hypo in tensities on T1WI,heterogeneous or slightly hyper intensities on T2 WI. The cystic components showed long T1 and long T2 signal intensities. Peri tumoral strip like structures adhered to ventricle wall,corpus callosum and septum pellucidum could be seen in 7 patients. On post contrast MRI,the solid parts demonstrated mostly mild and partly moderate enhancement,the cystic part showed non enhancement. Ring like marked enhancement could be assessed at the peri necrotic area or the peri necrotic parenchyma showed slightly long T1 and T2 signal intensities with marked enhancement in 6 patients; intra /peri lesional vascular ectasia was observed in 5 patients,heterogeneous signal intensities in extra ventricular lesions were seen in 4 patients. Conclusion:Central neurocytoma had certain characteristic appearances on MRI,diagnosis could be made in com bination with the age and location of the lesion.%目的:探讨中枢神经细胞瘤的MRI表现.方法:回顾性分析经手术病理证实的14例中枢神经细胞瘤患者的MRI资料,所有患者均行MRI平扫及增强.结果:10例位于侧脑室邻近透明隔及Monro孔处,其中8例位于侧脑室体部前三分之二,2例位于后三分之二,2例突入三脑室内,均伴双侧脑室积水扩大,以同侧侧脑室为著.MRI上病变均呈囊实性,实性成分T1WI呈等或稍低信号,T2WI呈不均匀等或稍高信号,囊性部分呈长T1、长T2信号,7例瘤周伴条索样结构并与脑室壁、透明隔及胼胝体粘连;增强后实质多呈轻度强化,部分中度强化,囊变不强化,6例可见坏死周围环状明显强化或坏死周围及实质内稍长T1、T2信号明显强化,5例病变内及边缘见纡曲增粗血管影.4例脑室外病变呈混杂信号.结论:中枢神经细胞瘤的MRI表现有一定特征性,结合年龄及病变部位,可考虑诊断本病.
展开▼
