"Dippsy" cure dilemma.

[Austin]

I have a beautiful 10" white fan tailed goldfish in my pond. I think she has the "Dippsy" w/ the enlarged belly for a year now. She seemed to be very normal w/ no particular issues except for a very large belly. How can I find out if she has the Dippsy or not?
I read that Epsom salt treatment is a possible cure . I am debating whether I should move her to a 20 gal tank and try the treatment. Of course I am also afraid that this new environment could stress her out kill her.

 

[IPA]

Welcome to the forum @Austin What is dippsy? Drawing a blank on the web. Do you mean dropsy?

 

[DutchMuch]

Dropsy is a true sign of bad water quality.

 

[Lisak1]

I think you mean dropsy - but I doubt it's dropsy if the fish is still alive a year later.

 

[IPA]

I think you mean dropsy - but I doubt it's dropsy if the fish is still alive a year later.

Could possibly be a tumor

 

[Mmathis]

Can you take some pictures of the fish so we can see what you are talking about? How long have you had this particular fish? Is there anything else that looks unusual? We can't give you good advice unless we have more information.