神经元和混合性神经元-神经胶质肿瘤的MRI表现

MRI findings of the neuronal and mixed neuronal-glial tumor

目的:提高对神经元和混合性神经元-神经胶质肿瘤的影像特征的认识。方法:回顾性分析11例经手术病理证实的神经元和混合性神经元-神经胶质肿瘤病例的影像学资料及临床资料。结果:3例中枢神经细胞瘤均发生于侧脑室内,瘤体呈囊实性,1例伴不规则钙化,增强扫描示肿瘤实质明显强化。2例脑室外神经细胞瘤,1例位于基底节区,瘤体呈实性伴部分钙化,增强后呈不均匀强化;1例发生于颈髓,肿瘤内有液化坏死,增强后轻度强化。3例节细胞胶质瘤,病变均呈囊实性混杂信号,瘤体实质部分明显不均匀强化。3例节细胞瘤,病变均为实性,信号均匀或混杂,增强扫描示肿瘤呈轻度～明显强化。结论:神经元和混合性神经元-神经胶质肿瘤的影像学表现有一定的特征性,结合临床病史综合分析能提高术前诊断准确性。

Objective：To promote the recognition of the characteristics of the neuronal and mixed neuronal-glial tumor.Methods：The imaging findings and clinical history of 11 subjects with the neuronal and mixed neuronal-glial tumor proven by surgical pathology were analyzed retrospectively.Results：All 11 cases were confirmed as follows：3 central neurocytomas occurred in the lateral ventricle with cystic changes and remarkable enhancement,one of them with irregular calcifications;2 extraventricular neurocytoma,one of them located at basal ganglia as a solid tumor with partial calcification and enhanced heterogeneously,and another one in the cervical spinal cord with colliquation necrosis and slight enhancement;3 gangliogliomas with partly or mainly cystic mixed signals after contrast enhancement;3 gangliocytomas appeared to be solid,with homogenous or mixed signals and slight to marked enhancement after contrast administration.Conclusion：Neuronal and neuronal-glial tumor have some imaging characteristics and thus provide accurate preoperative diagnosis with closely combining the clinical history.