They were not and are still not able to pin down the cause...so that means they still dont know if it will happen again....but so far for todays update...the nuro docs walked in, removed her shunt ( or the drain that goes into her brain ) and stiched her up and left!!! This is amazing news...and it also means they will be able to move her into rehab now :) until they do so which could be as soon as tomorow...i doubt it though..they will get her into a chair and sitting up, and they will be able to work harder and further with her progress. there has been talk for days about making it perminent..so it was a complete shock when they called to tell me it was removed :) my baby girl is one step closing to coming home now. I should add...that she still cant move her neck or head, or mouth or her left side..so progress is still slow moving