中枢神经细胞瘤的影像学表现及其临床价值

目的探讨中枢神经细胞瘤特征性影像学表现及其临床诊断价值。方法回顾性分析经临床病理证实的8例中枢神经细胞瘤患者的临床及影像资料,所有病例均行MR平扫及增强检查,其中3例同时行CT检查。结果 8例均为青年人,所有肿瘤均位于侧脑室透明隔,并跨透明隔生长,邻近Monro孔,肿瘤均具有不规则形态;MR表现为T1WI上呈等、低信号,T2WI上呈不均匀稍高信号,特征性的表现为蜂窝状或丝瓜瓤样改变及"索条征",增强后病灶轻至中度强化,囊变区无强化,肿瘤实质在CT平扫多呈等密度及稍高密度,多伴有散在钙化灶。结论 CT能清楚显示瘤内钙化,MR更能清晰显示瘤内丝瓜瓤样或蜂窝状改变,中枢神经细胞瘤的MR表现具有一定的特征性,对中枢神经细胞瘤的诊断具有重要价值。

Features and diagnostic value of imaging examination in the central neurocytoma

Objective To investigate the clinical manifestation and diagnostic value of imaging examination in the central neurocytoma.Methods Retrospective analysis of 8 clinically and pathophysiologically proven central neurocytorna patients imaging data and combined with other reports.All cases examined by plain and enhancement,both MR and CT scan were performed on 3 cases.Results 8 cases were young,all tumors were located in the lateral ventricle septum and growth across the septum,near Munro hole,tumors were of irregular shape;MR on TI WI showed iso-or low signal,72WI showed on slightly uneven high signal,the performance characteristics of a honeycomb-like changes or loofahs and ＂streaks＂ sign,enhanced lesions with mild to moderate enhancement,cystic no enhancement in CT scan tumor parenchyma mostly equal density and higher density,many accompanied by scattered calcification.Conclusion CT can clearly show intratumoral calcification,MR more clearly show the tumor loofahs or honeycomb-like changes in the MR appearance of central nervous system tumors have certain characteristics,for the diagnosis of central nervous system tumors has important value.