Well, I wish I could tell you, but here i sit 26 years later after 2 surgeries, and i still have it too.

No one can tell ME why either!! I was just told that it is permanent and i have to live with it. How nice. The surgeon just wanted to get rid of me as fast as he could --- all he did was ask me what he could do for me -- If I'd asked for $10,000 I think he would have given it to me -- he seemed panic stricken. Couldn't figure him out.
Wish i could help you. Perhaps if you went to a teaching hospital -- is there one near you? You'd probably get a better answer there. Best of luck. Hugs, Lee