中枢神经细胞瘤的影像学研究

Imaging study of central neurocytoma

目的:研究中枢神经细胞瘤的影像学特点。方法:回顾性研究经病理证实的中枢神经细胞瘤12例,男6例,女6例,年龄17-55岁,平均33.8岁,分析其MRI及CT表现。结果:肿瘤均位于透明隔及侧脑室,邻近Monro孔处,5例进入第三脑室,T1WI及T2WI均表现为与皮层灰质相等或略高信号,边缘清楚,体积较大,边缘及内部可见多发囊泡,常见钙化。结论:年轻人透明隔及侧脑室多囊有钙化肿瘤,应高度怀疑中枢神经细胞瘤,MRI是术前诊断中枢神经细胞瘤的最佳影像学方法,CT对肿瘤钙化更为敏感。

Objective： To study the imaging findings of central neurocytoma. Methods： MRI and CT findings of 12 cases central neurocytoma proved by pathology were reviewed retrospectively. The patients included 6 males and 6 females, age 17-55 with the average of 33.8 years old. Results： All tumors with well-defined margins and large size located in septum pellucidum and lateral ventricles adjacent to foramen Monro. Five of them proturded into the third ventricle. Solid part of the tumors presented as isoor slightly hyper-intense to cortical gray matter on T1WI and T2WI. Multiple cystic degenaration can be seen in most of the patients. Calcification was common. CT is a more sensitive method in indentifying calcification. Conclusions： Central neurocytoma should be highly suspected when a mass located in septum pellucidum and lateral ventricles in a young patient. MRI is useful in making a preoperative diagnosis and prognosis of central neurocytoma. CT is more sensitive in identifying calcification in the tumor.