One summer they found a cavernous malformation and then they did surgery on that, and it was the scar tissue from that surgery that caused the seizures. The seizures controlled my life more than I did at that point, before the RNS System. My name is Tracey and I have had the RNS for about a year and a half. I have actually had epilepsy for about 14 years and the RNS has changed my life completely.