Chiari Malformation

Chiari I

Low tonsils.

Small fourth ventricle.

Hydromyelia.

Klippel feil.

Occipitalization of the atlas.

 

Chiari II

Myelomeningocele.

Low tentorium.

Medullary kink.

Hydrocephalus.

Beaked tectum.

Corpus callosum agenesis.

Polymicrogyria.

Syringomyelia.

Lacunar skull.

 

Chiari III

Cervical occipital encephalocele that contains cerebellum.

 

Chiari IV

Severe cerebellar hypoplasia.

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