"There may also be evidence of fetal ventriculomegaly due to obstructive effects as a result of downward cerebellar herniation.Additionally, many of the associated malformations (e.g. corpus callosal dysgenesis) may be identified."
"While Chiari 1 malformation is thought to result from a small posterior fossa, Chiari 2 occurs due to in utero malformation of the spine and cranial structures, resulting in a characteristic displacement of the medulla, fourth ventricle, and cerebellum through the foramen magnum."
"As almost all neonatal patients with Chiari 2 have myelomeningocele, it has been suggested that the underlying aetiology is that of in utero CSF leak due to open spinal dysraphism. Older patients with Chiari 2 without myelomeningocele are thought to have had either a smaller neural tube defect or subsequent closure of the defect in utero."
"performed on the in utero fetus at some centres in select cases to improve outcomes 9"
"stenogyria/polymicrogyria (probably not the same as polymicrogyria encountered in schizencephaly 7)"
"does not have a myelomeningocele"
"Luckenschadel skull"
"Chiari 1 malformation"
Expected headings
"Associations"
"Posterior fossa"
"Spine"
"It should be noted that the term Arnold-Chiari malformation should no longer be used; see the Chiari malformations history and etymology section for more information."
"fenestration of the falx with interdigitated gyri or absent falx; heart shape incisura"
"History and etymology"