,PROCEDURE:,  Occipital craniotomy, removal of large tumor using the inner hemispheric approach, stealth system operating microscope and CUSA.,PROCEDURE:,  The patient was placed in the prone position after general endotracheal anesthesia was administered. 
,PROCEDURE : , Occipital craniotomy , removal of large tumor using the inner hemispheric approach , stealth system operating microscope and CUSA.,PROCEDURE : , The patient was placed in the prone position after general endotracheal anesthesia was administered .