I had my 1st surgery in July 2009. I was much better for a while, then slowly grew a large, squishy, lump on the back of my head Filled with cfs. Had a second surgery over Thanksgiving. The patch "failed". My new patch is bovine. For 2 months I truly felt I was going to die... Had a 8 day stay in hosp. after an emergency ambulance trip to said hosp. in Feb1019. Seizures, short term memory loss, balance problems, "word salad" total confusion. Can't drive, can't take long walks.