My son was diagnosed with an arachnoid cyst a few months ago after having seizures/persistent headaches . Neurologist does not seem very concerned about it, just monitoring, will do MRI Q 6 months. Every year, we go to six flags and this year I am concerned about the effect it might have on this cyst. His neurologist says its okay to do the same things he has done prior to knowledge of the cyst. Just wondering if there were any special precautions recommended? And if it is not recommended for rides/roller coasters? He is 9
Hi, Thank you for posting your query. Arachnoid cyst in the brain can be present since birth in most cases, but it comes to light only when MRI or CT of the brain is done.  Arachnoid cyst contains fluid (cerebrospinal fluid) and it is not a tumor.  Arachnoid cyst most commonly causes headache or fits. For fits, anti-epileptic medications are required.  In most cases, surgery is not required. Surgery is only required if the arachnoid cyst starts pressing on the normal brain tissues.  So, I agree with your doctors approach. Repeat MRI would show whether the cyst in enlarging or whether it is pressing on the adjacent brain tissue. So, at present no need to worry and child need not restrict any activity. I hope it helps. Best wishes, Chat Doctor.