thank you for responding. I probably used wrong wording. The 6yo dog was found abandoned and upon examination a baseball sized tumor was noted and apparently was on bladder. It was successfully removed and was benign. The rescue said the vet then called it a cyst but perhaps that was to make it more understandable to lay people. Hopefully I have explained it better now
My friend would love to adopt this dog but is a little wary about whether its likely to recur, the rescue apparently said the vet didn't think so but we would like to get another professional opinion. There are no records on the dog because it was found abandoned.