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目的 分析灰质异位症 (GMH)CT表现。材料与方法 搜集经CT检查发现的GMH 10例 ,其中男 3例 ,女 7例。儿童组 7例 ,年龄 2～ 11岁 ,平均 5 .9岁 ,均有智力发育障碍 ,伴癫痫者 2例。成人 (对照 )组 3例 ,年龄分别为 2 0、2 2和 76岁 ,均为意外发现。早期病例 ( 1993年前 ) 5例 ,应用颅脑CT机作平扫加增强。后期病例 5例 ,应用全身CT机作单纯平扫。结果 单灶 4例 ,双灶 5例 ,3灶 1例 ,共计有病灶 17处。团块状 10处 (均为儿童组 ) ,结节状 3处 (儿童组 1例 ,成人组 2例 ) ,串珠状 2处 (成人组 1例 ) ,环带状 2处 (儿童组 1例 )。全部团块状、串珠状和环带状以及 1处结节状与室管膜相连 ,2处结节状位于皮质下白质内。室管膜下病灶突入脑室使脑室变形 ,1例病灶压迫右室间孔致单侧性脑积水 ,伴胼胝体发育不全 4例 ,透明隔缺如 2例 ,枕大池扩大、蛛网膜囊肿不除外 1例。结论 依据本组病例及文献报道提出如下分型 :根据病变范围可分为局灶型和弥漫型 (带状 )。根据病灶是否与室管膜相连又可分为室管膜下和非室管膜下 2种。本组 17处病灶中室管膜下局灶型 ( 13 /17)占 76.4% ,弥漫型 ( 2 /17)占 11.8% ;非室管膜下局灶型 ( 2 /17)占 11.8% ,弥漫型未见。轻型GMH在儿童期较少发病 ,不易在儿童期发现。在儿童期?
Objective To analyze the CT findings of GMH. Materials and Methods 10 cases of GMH found by CT examination were collected, including 3 males and 7 females. Children’s group 7 cases, aged 2 to 11 years, mean 5.9 years, all have mental retardation, with epilepsy in 2 cases. In the adult (control) group, 3 patients were aged 20, 22, and 76 years old, all of whom were surprised to find out. Early cases (before 1993) in 5 cases, the application of brain CT scan enhancement. 5 cases of late cases, the application of whole body CT for simple plain scan. Results A single stove in 4 cases, double stove in 5 cases, 3 cases in 1 case, a total of 17 lesions. (10 children in group), 3 in nodules (1 in children group, 2 in adult group), 2 in beaded group (1 in adult group), 2 in annular zone (1 in children group ). All the lumps, beaded and annular bands and a nodular connected with the ependymal tube, nodular in 2 located in the subcortical white matter. Subependymal lesions into the ventricle to make the ventricle deformation, 1 case of right ventricular hypertrophy induced unilateral hydrocephalus, with corpus callosum hypoplasia in 4 cases, 2 cases of clear septum, occipital cistern enlargement, arachnoid cyst is not excluded 1 case. Conclusion Based on the group of cases and reported in the literature the following sub-type: According to the lesion can be divided into focal and diffuse (ribbon). According to whether the lesion is connected with the ependymal can be divided into subependymal and non-ependymal under 2 species. Of the 17 lesions in this group, focal ependymal volume (13/17) accounted for 76.4%, diffuse type (2/17) accounted for 11.8%; non-ependymal focal lesions (2/17) accounted for 11.8% Diffuse no seen. Light GMH less incidence in childhood, not easy to be found in childhood. In childhood?