侧脑室中央性神经细胞瘤CT和MRI误诊与鉴别

目的 分析侧脑室中央性神经细胞瘤的ＣＴ和ＭＲＩ表现。方法 回顾性分析经手术病理证实的中央性神经细胞瘤５例，男３例，女２例，年龄２０岁－４４负，平均年龄３0.4岁，ＣＴ检查３例，ＭＲＩ检查４例。结果 肿瘤位于侧脑室内前２／３，边界清楚，ＣＴ平扫呈略高密度，增强扫描肿瘤增强不明显，ＭＲＩ表现为略短Ｔ１，略长Ｔ２信号，本组５例中，３例误诊为室管膜瘤，２例误诊为星形胶质细胞瘤。结论 中央性神经细胞瘤影像学有特征性表现，ＣＴ和ＭＲＩ是该病有效的检查手段，侧脑室前２／３处发生的肿瘤，鉴别诊断应考虑到中央性神经细胞瘤。

Misdiagnosis and Differentiation of Central Neurocytoma in Lateral Ventricle by CT and MRI

Objective To analyze CT and MRI features of central neurocytoma in lateral ventricle.Methods Five cases with central neurocytoma proved by surgical operation were retrospectively analyzed.There were 2 women and 3 men in this series.The average age was 30.4 years(range 20 to 44 years).Three cases were examined with CT and 4 cases with MRI.Results The tumors were located at about foramen of monro in the lateral ventricle and clear boundary.On plain CT scan,the tumors were slightly hyperdense.The MRI findings were the tumors appeared slightly hyperintense on T 1W 1,and slightly hyperintense on T 2W 1.Five cases of central neurocytoma were misdiagnosed as ependymoma in 3 cases,astrocytoma in the corpus callosum in 2 cases.Conclusions Central neurocytoma possessed certain specific features,CT and MRI features of the tumors are useful for diagnosis.In the differential diagnosis of tumors occurring in the 2/3 of the lateral ventricle the possibility of central neurocytoma should be also taken into consideration.