中枢神经细胞瘤的MR诊断及鉴别诊断

MR Diagnosis and Differential Diagnosis of Central Neurocytoma

目的:探讨中枢神经细胞瘤的MR表现及鉴别诊断。方法:回顾性分析8例经手术及病理证实的中枢神经细胞瘤的临床资料、MR表现,总结诊断经验。结果:8例肿瘤中7例位于侧脑室前部孟氏孔周围,1例位于第三脑室内。8例肿瘤均呈囊实性,肿瘤实性成分呈T1WI等或略低信号,T2WI呈等或高信号;囊性成分T1WI呈低信号,T2WI囊性成分呈高信号。多发的囊性部分常被分隔成"蜂窝"状改变。增强扫描病变实性部分呈明显或中度强化。结论:结合患者的发病年龄、特征性的发病部位、MR平扫及增强特点,MR可对中枢神经细胞瘤做出正确诊断。

Objective：To explore the MR diagnosis and differential diagnosis of central ncurocytoma. Methods： 8 patients with pathologically proved central neurocytoma were retrospectively reviewed, and the MRI appearances were ob- serve＆ Results： Among the 8 cases, 7 cases lesions located adjacent to the lateral ventricle near Monro＇ s foramen, one lesion located at the third ventricle. All 8 cases lesions appeared as mixed cystic-solid pattern. On T1W1, the solid portion showed iso-or hypo-intensity and the cystic part showed hypointensity. On Tz WI, the solid portion showed iso-or hyper-intensity and the cystic part showed hyperintensity. The cystic portion appeared as＂honey-comb＂-like areas loca- ted at the periphery or inside the tumor. After administration of Gd-DTPA intravenously, the solid portion showed marked or medium enhancemen. Conclusion：Central neurocytoma in the lateral ventricle enjoys typical location;consid- ering the age of patients, non-contrast and contrast MR findings, correct diagnosis of central neurocytoma can be made.