What simtomy defect of a nervous tube should be readable" at inspection...

[Nina]

What simtomy defect of a nervous tube should be readable" at inspection on US at pregnancy (25 27 weeks)? It is grateful for the answer.

[Oshchepkova S.R.]

1. An anencephalia: absence of bones of a cerebral skull and absence of a tissue of a brain; 2. An exencephaly: absence of a cerebral skull, presence of an abnormal tissue of a brain; 3. meningotsele head: the unicameral liquid diverticulum which is starting with area a brain. Skulls, presence of osteal defect, etc. is a lot of Defects.