A member asked:

Sorry if left un treated can arachnoid cyst causing seizure vision headache motor function loss memory loss weight loss kill you i've had it for 10yrs?

A doctor has provided 1 answer
Dr. David Lipkin answered

Specializes in Internal Medicine

Qualified NO: Only approximately 5% of arachnoid cysts become symptomatic, and 75% of the symptomatic cysts occur in children, not adults. So your approximate chance of becoming symptomatic is 1% i.e. it's 99% likely that the cyst won't bother you. Depending on the location the cyst could cause seizures or vision problems, etc. However, NO treatment is indicated UNLESS the patient has symptoms.

Answered 5/21/2015

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