CSF "Capsule" below cerebellum

It was a fight to get my diagnosis, but once I did I received a decompression surgery. I started to feel my symptoms to back off more than I thought would. 2 Months after surgery I got a CSF leak from one of the sutures on my dura, it created a bulge on the back of my head with INSANE horrible symptoms. Its been a year since I had the leak and it went down with no more leaking, but there is still a collection of fluid stuck in a “capsule” that was formed. Im now currently trying to figure out if anyone has had this happen to them and if you got surgery?