脑裂畸形的CT、MRI诊断价值(附19例分析)  

The value of CT and MRI in diagnosing schizencephaly(analysis of 19 cases)

作　　者：沈庆隆[1] 詹阿来[1] 余主花[1] 蔡毅勇[1] 黄睿刚[1] 

机构地区：[1]福建省漳州市医院放射科,福建漳州363000

出　　处：《医学影像学杂志》2001年第4期230-232,共3页Journal of Medical Imaging

摘　　要：目的 :分析脑裂畸形的CT和MRI表现特点并比较CT和MRI对该病的诊断价值。方法 :回顾分析 19例脑裂畸形的CT、MRI资料 ,其中CT检查 15例 ,MRI5例 ;男性 12例 ,女性 7例 ;年龄 10岁以下 14例 ,11～ 38岁 5例。结果 :CT、MRI特征性表现为病侧大脑半球内自皮质到侧脑室的横跨裂隙 ,裂隙两旁为内折的灰质 ,在CT上与皮质呈等密度 ,MRI在T1、T2 加权像上与皮质呈等信号。裂隙内端多数有侧室外侧壁的憩室状突起 ,外端表面开口处均有楔形或扇形扩大。根据裂隙能否被肉眼看出可分为 :(1)融合型 :特点为裂隙前后的灰质层相贴或融合 ,裂隙关闭 ;(2 )分离型 :特点为内折皮层分离 ,形成较大的裂隙与脑室相通。 5例裂隙附近脑皮质有多微小脑回 ,2例有巨脑回 ,11例合并透明隔缺如 ,1例合并胼胝体发育不良。结论 :脑裂畸形的CT和MRI有特征表现 ,而MRI优于CT。Objective:To analyse the CT and MRI manefistations of schizencephaly and to compare their value in diagnosing this disease.Methods:The CT and MRI findinds of 19 cases of schizencephaly were analyzed retrospectively.There were 12 male patients and 7 female patients.Fourteen patients were under the age of 10 years and the remained 5 patients were in the age range of 11～38 years.Results:The characteristic CT and MRI finding of the disease was a transcerebral fissure extending from pial suface of the involved brain to the lateral ventricle.The fissure was lined by rolling in gray matter that maintaines the same density in the CT and the same signal intensity in the MRI as normal cortical gray matter.The ventricular side of the fissure usually was a diverticulum defect of the lateral wall of the ventricle and the cortical side constantly was a large fan shaped CSF cavity.Depending on the fissure is visible or not,the disease could be divided into two types:(1)fuse type,the apposite layers of the gray matter cleft clung each other and the fissure closed.(2)separated type,the apposite layers of cortex were separated by an open cleft extending from pial surface of the brain to ventricle.The associated abnormals included polymicrogyria(5 cases),pachygyria(2 cases),septum pellucidum absent(11 cases) and corpus callosum dysplasia(1 cases). Conclusion:Schizencephaly has characteristic CT and MRI manifestations.MRI is superior to CT in demonstrating those features.

关 键 词：脑裂畸形 X线计算机体层摄影术 磁共振成像 诊断 CT MRI 

分 类 号：R742.8[医药卫生—神经病学与精神病学] R816.1[医药卫生—临床医学]