Hello. I underwent four craniotomies 16 years ago and I have a programmable VP shunt for arachnoid cysts. I also have slit ventricle syndrome. Recently, a ct scan showed mild left lateral ventricle larger than the right. This is a new development for me. My shunt is on the right in my posterior fossa. I'm not sure what this means. I have many symptoms that I have been battling for awhile now. Does anyone have input on this? Thank you.