I am now going for an MRI to see if I may have the same problem. I am now concerned that I may have the same cyst as my brother. The answer to your question should be answered soon with the new MRI scan. The cysts are filled with cerebral spinal fluid but do not communicate with the venticles. They are usually incidental but can be associated with neurologic symptoms.
Drainage usually results in the cysts just re-expanding.
Surgery is a rare event unless it is felt that some other process underlies the cyst. As far as I know there is not a genetic link and pregnancy itself does not pose a problem. This information is provided for general medical education purposes. PLease consult your doctor for diagnostic and treatment options. All rights reserved.