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As your cyst has increased in size and is causing symptoms that is headache, surgery can be considered at this stage. Routine open brain surgery has greater risks of bleeding and neural injury though new technique called endoscopic sinus surgery has decreased the riskd many fold, this curative procedure begins by creating a "keyhole" smaller than a dime behind the ear. From there, a slender endoscope slides over the top of the cerebellum and through a natural pathway to access the deep-seated pineal tumor, without the need for any metal retractors or the need to go through normal brain tissue. This revolutionary procedure is used to completely excise the tumor. I would recommend you to followup with neurosurgeon for exact plan.
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