脑部脉络膜裂囊肿的MRI诊断  

MR imaging of choroidal fissure cyst of the brain

作　　者：马林[1] 李宏军[1] 安宁豫[1] 叶慧义[1] 蔡幼铨[1] 

机构地区：[1]解放军总医院放射科,北京100853

出　　处：《中华放射学杂志》2004年第6期584-586,共3页Chinese Journal of Radiology

摘　　要：目的　探讨脑部脉络膜裂囊肿的MR影像学表现及其诊断价值。方法　对 16例脉络膜裂囊肿的MR影像学特征进行了回顾性分析 ,对MR影像与临床表现之间的关系进行了讨论。结果　 16例病灶均位于脉络膜裂内 ,表现为界线清楚的囊性病变 ,囊壁及其周围无软组织信号 ,内部信号均匀且在各个序列上均与脑脊液信号一致 ,平均大小为 0 9cm× 1 3cm× 1 5cm ,病灶周围均无水肿。 6例行钆喷替酸葡甲胺 (Gd DTPA)增强扫描后均未见病灶强化。结论　脑部脉络膜裂囊肿是 1种良性的先天性发育异常 ,通常与临床表现无关。由于脉络膜裂囊肿发生在特殊的位置 ,横轴面扫描易误诊为脑内病变 ,MR冠状面及矢状面扫描可做出明确诊断并能够与其他囊性病变相鉴别。Objective To investigate the MR manifestations and diagnostic value in patients with choroidal fissure cyst of the brain. Methods Characteristic MR findings in 16 patients with choroidal fissure cyst were retrospectively analyzed, and the correlation between MR imaging and clinical manifestations was reviewed. Results The cysts were situated within the choroidal fissure in all cases, representing as cystic lesion with clear border, no detectable soft tissue mass in the cyst wall or adjacent area, homogenous signal intensity identical to CSF on all sequences, with the average size of 0.9 cm×1.3 cm×1.5 cm, and no associated edema. Gd-DTPA was performed in 6 cases and revealed no evidence of enhancement. Conclusion The choroidal fissure cyst of the brain is a benign and congenital developmental abnormality, and has minor clinical significance. Because of its specific anatomic location, the choroidal fissure cysts simulate intraparenchymal cystic lesions on axial images. Coronal and sagittal MR imaging can be used to delineate its extraaxial location and make the correct diagnosis, and, thus, differentiate with other cystic lesions.

关 键 词：脑部脉络膜裂囊肿 MRI 诊断 回顾性分析 脑脊液 

分 类 号：R445.2[医药卫生—影像医学与核医学]