脑室内胶质瘤的MRI诊断

MRI Diagnosis of Glioma in Ventricles

目的分析脑室内胶质瘤的MRI特点,提高诊断准确性。资料与方法经手术病理证实的脑室内胶质瘤29例,其中20例位于侧脑室,2例位于三脑室,7例位于四脑室。29例均行MR平扫及增强扫描。结果(1)大多数脑室内胶质瘤如室管膜瘤、星形细胞瘤、脉络丛乳头状瘤等具有特征性的MRI表现;(2)部分肿瘤具有其好发部位,如脉络丛乳头状瘤好发于侧脑室三角区,室管膜瘤好发于侧脑室体部,髓母细胞瘤好发于四脑室区;(3)某些肿瘤具有年龄和性别特征,如星形细胞瘤患者年龄均<30岁,脉络丛乳头状瘤患者年龄均>50岁,室管膜瘤女性占66.67%。结论脑室内胶质瘤有比较特征性的MRI表现,结合患者临床和发病年龄、性别、部位等特点,可进一步提高其术前诊断准确性。

Objective To analyze the MRI findings of glioma in ventricles in order to improve diagnostic accuracy. Materials anti Methods 29 cases of the glioma in ventricles proved by pathology were reviewed. 20 cases were in the lateral ventricles, and 2 cases were in the third ventricle, and 7 cases were in the fourth ventricle. All cases were performed with pre and pest contrast MRI scans. Results （1）Most gliomas such as ependymoma, astrocytoma, choroids plexus papilloma, had characteristic MRI appearances; （2）Part of the gliomas had specific location. Choroid plexus papilloma frequently occurred in ventricalar atrium. ependymoma frequently occurred in ventricalar body, while medalloblastoma frequently occurred in fourth ventricle; （3）Some gliomas had specific patient＇ s age and gender, the choroid plexus papillomas occurred above 50y, while the astrocytomas occurred bellow 30y, and 66.67 % ependymomas occurred in grown up female patients. Conclusion The accuracy of diagnosis of gliomas in ventricles depends on their characteristic MRI appearances and specific tumor location and patients＇ age and gender.