侧脑室肿瘤的MRI诊断  

MRI Diagnosis of Lateral Ventricular Tumors

作　　者：熊伟[1] 张雪林[1] 宛四海[1] 张兴华[1] 

机构地区：[1]南方医科大学南方医院影像中心,广州510515

出　　处：《放射学实践》2007年第2期146-149,共4页Radiologic Practice

摘　　要：目的：分析侧脑室肿瘤的MRI特征，提高对侧脑室肿瘤的诊断水平。方法：48例侧脑室肿瘤患者，其中41例经手术病理证实包括脑膜瘤13例，室管膜瘤10例，星形胶质细胞瘤4例，少突胶质细胞瘤、室管膜下瘤、脉络丛乳头状瘤和胶样囊肿各2例，室管膜下巨．细胞型星形细胞瘤和神经母细胞瘤各1例；7例转移瘤原发肿瘤明确。回顾性分析其MRI表现，按病变部位分为侧脑室三角部，体部，前角及室间孔区。按年龄分为〈10岁，10～30岁和〉30岁三个年龄组。结果：本组中11例（11／13）脑膜瘤增强表现为明显均匀强化，8例（8／10）室管膜瘤可见多发囊变区，2例（2／4）星形胶质细胞瘤可见瘤内出血；11例（11／13）脑膜瘤发生于侧脑室三角部，5例室管膜瘤及4例星形胶质细胞瘤发生于侧脑室体部，所有室管膜下瘤（2例）、室管膜下巨细胞型星形细胞瘤（1例）和胶样囊肿（2例）均发生于侧脑室前角及室间孔区；10例（10／13）脑膜瘤发生于30岁以上，3例（3／4）星形胶质细胞瘤发于10～30岁，7例转移瘤全部发生于30岁以上。结论：侧脑室肿瘤的诊断和鉴别诊断主要依据其MRI表现，结合肿瘤的部位和年龄特征可提高诊断准确性。Objective：To analyze the MRI appearances of lateral ventricular tumors in order to improve the diagnostic accuracy. Methods：The MRI manifestations of 48 patients with lateral ventricular tumor were analyzed retrospectively,including pathology proved meningioma （ n=13）, ependymoma （ n= 10）, astrocytoma （ n= 4）, oligodendroglioma, choroidal papilloma and colloid cyst （n= 2 for each） ,subependymal giant cell astrocytoma and neuroblastoma （n= 1 for each） ;brain metastases with known primary tumor （n= 7）. Patients were divided into three groups according to the location of tumor, including ventricular trigone, body, cornu anterius and interventricular foramen. While according to patient＇s age （〈 10 years, 10-30 years and 〉30 years）, other 3 groups were divided. Results： Marked enhancement after contrast administration was showed in 11 of the 13 cases （85 %） with meningioma, multiple cystic area were showed in 8 of the 10 cases （80 % ） with ependymoma. Intratumoral hemorrhage could be revealed in 2 of the 4 cases with astrocytoma. Of the meningiomas, 11 were located in ventricular trigone. 5 ependymomas and 4 astrocytomas were located in ventricular body. While all of the subependymomas, subependymal giant cell astrocytoma and colloid cysts were located in cornu anterius and interventricular foramen. 77% （10/13） of the meningioma occurred in patients over 30 years of age,3 of the 4 astrocytomas and all of the oligodendrogliomas occurred at 10-30 years of age,and all 7 metastases occurred in patients older than 30 years of age. Conclusion： The diagnosis and differential diagnosis of lateral ventricular tumors depended on their MRI appearances,diagnostic accuracy could be improved when combining with the specific tumor location and patient＇s age.

关 键 词：磁共振成像 脑室肿瘤 脑肿瘤 

分 类 号：R739.41[医药卫生—肿瘤]