I believe that the cyst drains directly back into the body cavity where it is readily absorbed. The fluid is a normal body fluid and is not toxic to the body, i.e.: it is not urine.
Thank you so much for your reply. I need clarification of one thing: Placing a permanent drain in the pseudocyst, does this mean it would drain into a bag? Please inform.
I will look for a veterinary teaching hospital. This information is greatly appreciated.
If your cat were my patient, I would refer you to a veterinary teaching hospital to be evaluated by a veterinary nephrologist, and other specialists.
Is there a veterinary teaching hospital or a referral clinic, with veterinary specialists near you?
To help make the decision as to whether to have the cyst removed or the kidney removed, or other surgery, it would be a good idea to have the function of both of your cat's kidney's evaluated by a test called a, "Glomerular filtration rate (GFR) determined by renal scintigraphy". This test is performed by a radiologist at a veterinary teaching hospital.
The surgery is also best performed by a boarded veterinary surgeon.
There is a Scientific Article in the "Journal of Feline Medicine" describing surgical treatment in a cat with a similar problem as your cat as follows:
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6WJC-4RS9STT-1&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=d2f6929f98512bfa75df5720b7dab830
The surgery in the cat’s case in the article was successful. The surgery consisted of placing a permanent drain in the pseudocyst, and, NOT with removing the cyst or removing the kidney.