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本文报告20例先天性四脑室中侧孔闭锁的CT诊断,男性13例,女性7例,年龄45d~8岁.CT表现:第四脑室囊状扩大9例;第四脑室囊状扩大通过小脑溪与后颅窝小囊腔相通4例,或大囊腔相连3例;第四脑室与两侧小脑半球大小不等的两囊腔相连1例;扩大的第四脑室向天幕上延伸7例;枕大池、脑沟、脑裂消失20例;第三脑室及两侧侧脑室对称性重度积水扩大20例.合并右额顶区硬膜下积液1例.本病需与后颅窝蛛网膜囊肿、囊性新生物和变异的巨大枕大池以及重度小脑发育不全鉴别.
This article reports the CT diagnosis of 20 cases of congenital four-ventricle medial-lateral atresia, including 13 males and 7 females, aged from 45 days to 8 years. CT findings showed cystic enlargement in the fourth ventricle in 9 cases; 4 cases were connected with small cysts in the posterior fossa, 3 cases were connected with large cysts, 1 case was connected with the second cyst in the fourth ventricle and both cerebellar hemispheres, and the fourth enlarged ventricle was extended in 7 cases ; Occipital large pool, sulci, brain crack disappeared in 20 cases; third ventricle and lateral ventricle symmetry of severe hydrocephalus to expand in 20. Combined with right subretinal fluid in 1 case. The disease and the posterior fossa Arachnoid cysts, cystic neoplasms, and giant cysts of variation, as well as the identification of severe cerebellar hypoplasia.