Objective To raise the preoperative accurate diagnostic ratio of central neruocytoma by CT and MR. Methods To retrospectively analyze the manifestations of 13 central neruocytomas confirmed by surgery and pathology on CT and MR, then summarize the features.Results The tumor's location:9 cases located at diaphragma ventriculom lateralium(including 7 cases nearing to Monro hole) ,3 cases located at lateral cerebral ventricular wall,1 case located at corpus callosum. The tumor's imageology:8 cases appearanced honeycomb or fasciculus vascularis luffae changes.There were funicles between each central neurocytoma and lateral cerebral ventricular wall in 5 cases.Parenchyrna of each central neurocytoma was isodense or slightly hyperdense on CT,isointense or slightly hypointense signals on MR.and mild or midrange enhancement on enhancement scan.In 10 cases, the parenchyma of each was mild or obvious hyperintense signals on DWI, especially the mottled hyperintense signals in some cases were their characteristics.The average ADC value was(0.84±0.11) × 10-3 mm2/s.Blood vessels were found in 4 cases and strip or lamellar calcifications were found in 3 cases.Conclusion The calcifications of tumor are more clearly on CT,the honeycomb or fasciculus vascularis luffae changes of tumor are more clearly on MR.The mottled hyperintense signals of tumor parenchyma reflect the histologic characteristics in some degree.%目的 提高中枢神经细胞瘤(CNC)的CT及MR术前诊断准确率.方法 回顾性分析13例经手术病理证实的中枢神经细胞瘤的CT及MR表现,总结其特征.结果 CNC发生部位:9例源于透明隔(其中7例靠近Monro孔),3例源于侧脑室壁,1例源于胼胝体内壁.影像学表现:8例呈明显蜂窝状或丝瓜瓤样改变,其中5例与侧脑室或胼胝体壁间见"索条"状牵拉影.肿瘤实质在CT上呈等信号或稍高信号,在MR上呈等信号或稍低信号,增强扫描呈轻至中度强化.10例行DWI检查,其实质均呈稍高信号或高信号,以花斑状高信号为其特征,ADC值为(0.84±0.11)×10-3mm2/s.4例瘤内见血管影,3例瘤内见条片状钙化影.结论 CT能清楚显示瘤内钙化,MR对瘤内蜂窝状或丝瓜瓤样改变显示更佳,DWI上肿瘤实质花斑状高信号在一定程度上反映了该肿瘤的组织学特征.
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