发生率最高的神经管畸形是脊柱裂，其他依次为无脑畸形、脑膨出、小头畸形。
The highest of neural tube defects is spina bifid a then is anencephaly encephalocele and so on.
最常见的神经管缺陷是脊柱裂，它是指胎儿期脊髓没有被完全封闭，和无脑畸形，它指部分或全部脑组织没有发育。
The most common neural tube defects are spina bifida, in which the spin al cord fails to close completely during fetal development, and anencephaly, in which part or all of the brain doesn't develop.
目的：探讨脑裂畸形的CT、MRI的影像特征。
Objective To investigate the ct and MRI imaging features of Schizencephaly.
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