On the morning of May 14, 2004, the patient arrived at the Outpatient CyberKnife Suite.  He was placed on the treatment table.  The Aquaplast mask was applied.  Initial imaging was used to bring the patient into optimal position.  The patient underwent stereotactic radiosurgery to deliver the 20 Gy to the AVM margin.  He tolerated the procedure well.  He was given 8 mg of Decadron for prophylaxis and discharged home.