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A member asked:
What are the causes of a subarachnoid cyst?
A doctor has provided 1 answer
USUALLY congenital: Subarachnoid cysts are usually congenital ('born-with')malformations that arise from the unexplained splitting or tearing of the arachnoid membrane. Arachnoid cysts can also occur secondary to other disorders such as Marfan syndrome, arachnoiditis, or agenesis of the corpus callosum. Complications can arise: e.g. Head trauma can cause bleeding in or around the cysts possibly causing symptoms.
Answered 2/18/2015
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