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A member asked:
Is arnold chiari malformation type one a neural tube defect?
A doctor has provided 1 answer
No: The more accepted term is chiari malformation as arnold-chiari is an older term. This type of malformation is not a neural tube defect, but rather an abnormal migration of the cerebellar tonsils below the level of the foramen magnum (chiari type 1). This defect is attributed to a congenitally small posterior fossa, thus allowing the cerebellar tonsils to migrate downward.
Answered 5/5/2016
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