Hello, im a 45 yr. old male who has already gone through a subarachnoid cyst removal in 2007. Recently I had a MRI  done for them to tell me I have another one which is bigger. Are they known for coming back? and if I have this next surgery,do I need to be concerned with another one returning? Thank you
Hi, Thanks for writing in. Recurrent subarachnoid cyst is not unheard of. Cysts can recur when only cyst aspiration is done and this can cause further development of the cyst even in 6 years after aspiration. Presently the cyst area can be filled with an inert material like Teflon and this prevents the cyst from growing again. Another treatment for such cysts is a cysto-peritoneal shunt may be required to definitively treat the cyst. This allows flow of cyst fluid from the cyst into the abdominal cavity, thereby relieving decompressing the cyst and relieving pressure on the surrounding structures