中枢神经细胞瘤的MR影像特征分析

目的:探讨中枢神经细胞瘤的MRI征象。方法:回顾性分析9例经手术和病理证实的中枢神经细胞瘤的MRI征象。结果:9例肿瘤中6例位于侧脑室前部Monro孔附近,1例位于右侧侧脑室体后部,1例位于三脑室,1例位于右侧额叶。9例病变均为囊实性,T1WI病变实性部分呈等或略低信号,囊性部分呈低信号;T2WI实性部分呈等或高信号,囊性部分呈高信号。囊性部分表现为肿瘤边缘或内部多发的蜂窝状改变,5例实性部分DWI呈高信号;增强扫描病变实性部分呈明显或中度强化。结论:结合MR影像学及病理表现,有助于明确中枢神经细胞瘤的诊断。

MRI characteristics of central neurocytoma

Objective：To study the MRI characteristics of central neurocytoma.Methods：To analyze retrospectively the MRI features of 9 patients with central neurocytoma confirmed by surgery and pathology.Results：Among the 9 cases,6 lesions located adjacent to the anterior lateral ventricle near Monro′s foramen,one case each located at posterior part of the body of right lateral ventricle,the third ventricle and the right frontal lobe.All 9 lesions appeared as mixed cystic-solid pattern.On T1WI,the solid portion showed iso-or hypo-intensity and the cystic part showed hypointensity.On T2WI,the solid portion showed iso-or hyper-intensity and the cystic part showed hyperintensity.The cystic portion appeared as ＂honeycomb＂-like areas located at the periphery or inside the tumor.5 lesions showed hyperintensity on DWI.After administration of GD-DTPA intravenously,the solid portion showed marked or medium enhancement.Conclusion：MRI in combination with pathology provides helpful information in the diagnosis of central neurocytoma.