
So sorry to hear about your dog and her illness. I will try to explain some things about this disease, which is rather uncommon, I think. Your vet must have taken blood-tests, and maybe also had an ultrasonography done, to give you this diagnosis. In the meantime, the antibiotics and creams were given in case there was an infection causing her symptoms.
The word syndrome means it's an illness in one organ, which is giving different symptoms in other parts of the body. (very basically explained)
This explains the ulcerations, which is one of the symptoms of this disease, when the actual illness is located to the liver (hepar). This illness affects the liver, which makes it both full off lumps, and also full of hollow parts. Since the liver is a vital organ for the body, you get very ill when it's not functioning as it should. The liver is where most of the cleaning of the blood is being done, so whithout it the blood gets full of residue products that turn poisonous when not disposed of. It's enough to say that this is a very unpleasant and painfull process, affecting the whole body and in the end all the organs. Unfortunatelly the antibiotics and creams will do no good at all. There is no cure for this disease, and no way of making your dog feel better even for a while.
I'm so sorry, but I agree with your vet, the best thing you can do for her, is to let her go. IMHO this is a privilige we have, to be allowed to spare our dogs the sufferings we humans sometimes have to go through. By taking her to the vet's, you have done everything you could for her, noone could have done anything more to help her.
Will be thinking of you and your girl.
Karen