8 doctors weighed in:
What is the difference between type 1 and type 2 chiari malformations?
8 doctors weighed in

Dr. William Singer
Pediatrics - Neurology
3 doctors agree
In brief: Chiari malformations
Type i is associated with a portion of the cerebellum called the tonsils, downwardly displaced through the foramen magnum at the base of the skull.
Most are asymptomatic. Type ii is usually associated with a failure of the spinal cord to close and is often associated with hydrocephalus.

In brief: Chiari malformations
Type i is associated with a portion of the cerebellum called the tonsils, downwardly displaced through the foramen magnum at the base of the skull.
Most are asymptomatic. Type ii is usually associated with a failure of the spinal cord to close and is often associated with hydrocephalus.
Dr. William Singer
Dr. William Singer
Thank
Dr. Ramin AmirNovin
Neurosurgery
3 doctors agree
In brief: Several things
Type 1 chiari is usually found in later life and the cerebellar tonsils descend below the skull.
Type 2 is usually found early on in life and associated with lower back defects in the spinal canal. The brain stem is also descended in type 2 chiaris and hence these patients are more symptomatic than type 1 patients. Please ask your md for more.

In brief: Several things
Type 1 chiari is usually found in later life and the cerebellar tonsils descend below the skull.
Type 2 is usually found early on in life and associated with lower back defects in the spinal canal. The brain stem is also descended in type 2 chiaris and hence these patients are more symptomatic than type 1 patients. Please ask your md for more.
Dr. Ramin AmirNovin
Dr. Ramin AmirNovin
Thank
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