5 doctors weighed in:
How common is it to have an arachnoid cyst and a chiari 1 malformation at the same time?
5 doctors weighed in

Dr. Shaym Puppala
Internal Medicine
3 doctors agree
In brief: 3% in 1 study
One study* found arnold-chiari type 1 malformation in 2 out of the 67 children w arachnoid cysts.
Study was small; actual number could be different, also could be differences amongst different populations. *pascual-castroviejo i, et al "primary intracranial arachnoidal cysts. A study of 67 childhood cases." childs nerv syst. 1991;7(5):257.

In brief: 3% in 1 study
One study* found arnold-chiari type 1 malformation in 2 out of the 67 children w arachnoid cysts.
Study was small; actual number could be different, also could be differences amongst different populations. *pascual-castroviejo i, et al "primary intracranial arachnoidal cysts. A study of 67 childhood cases." childs nerv syst. 1991;7(5):257.
Dr. Shaym Puppala
Dr. Shaym Puppala
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Dr. Roger Frankel
Neurosurgery
In brief: Uncommon
The two conditions do not have any direct connection in most patients.

In brief: Uncommon
The two conditions do not have any direct connection in most patients.
Dr. Roger Frankel
Dr. Roger Frankel
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