脑室肿瘤的MRI影像表现及鉴别诊断

MRI Findings and Differential Diagnosis of Intraventricular Tumors

目的分析脑室肿瘤的MRI影像特点,提高脑室肿瘤诊断的准确性。方法回顾性分析22例经手术病理证实的脑室占位性病变的MRI影像表现。结果不同脑室肿瘤的MRI表现有所不同,部分肿瘤具有某些特征性的表现。而大多数肿瘤具有发病年龄及好发部位特征。如脑膜瘤及中枢神经细胞瘤常见于中年人,而室管膜瘤及脉络丛乳头瘤则好发于儿童。脑膜瘤好发于侧脑室三角区,而室管膜瘤则好发于第四脑室;中枢神经细胞瘤则好发于侧脑室前角。结论 MRI影像学表现结合肿瘤的发病年龄及部位等可以提高脑室肿瘤的术前诊断准确率。

Objective To analyze MRI findings of intraventricular tumors and thus to improve diagnostic accuracy of tumors in the ventricle. Methods MRI findings of 22 cases of intraventricular tumors confirmed by pathology after surgery were retrospectively analyzed. Results MRI manifestations were different among all kinds of intraventricular tumors. Some tmique imaging features were found in certain intraventricular tumors. Most intraventricular tumors had certain relation with patient＇s age and their predilection site. For example, meningiomas and central neurocytomas were usually seen in middle- age adults, whereas ependymomas and choroid plexus tumors were often found in children. In addition, meningiomas tended to occur within the atria of the lateral ventricle; however ependymomas were more common in the fourth ventricle; besides, central neurocytomas were predominantly located in the anterior portion of the lateral ventricle. Conclusion A combination of imaging features, patient＇s age and tumor location can substantially improve the accuracy of diagnosis of intraventricular tumor.