They access your pineal region from beneath the
brain, so they do not affect your
brain at all. It sounds like a scary procedure but is actually straightforward for a good brain neurosurgeon. The surgeon essentially inserts a microscopic endoscope that magnifies the area by 50x and uses a navigation system to get him there. It is minimally invasive. The medical literature says that most patients whose pineal cysts are not too large (e.g., < 4.