Ranger diagnosed with Lymphoma

Ranger, has been in Tufts veterinary hospital since Monday. Two weeks ago, upon return from North Carolina, we noticed him limping. Despite several visits to our vet, and trials of several medications, Ranger declined rapidly. He became unable to stand and began dragging his hind behind him. The doctors at Tufts have been terrific but are still not clear on the cause of Rangers neurological decline. An MRI revealed a lesion on his spine but the cause isn't certain. A spinal tap was done and all of the results have been negative except one that we are anxiously awaiting the results of. The doctors have said that the lesion could be caused by 3 things: a fungal infection in his spine (the test we are waiting for), an auto-immune disease, or lymphoma. If we knew the cause, it would be easier to pinpoint treatment. But since it isn't clear, the doctors are treating all three because he was declining too rapidly to wait for test results. Ranger has been receiving an anti-fungal through his IV daily, IV fluids, and high doses of prednisone. The doctors said Ranger has begun to have feeling in his back paws so this is a positive sign but still has a long road ahead. He received his first radiation treatment yesterday and the doctors have stated that they feel he will recover. I have put down a large part of money onto the bill for rangers treatment but will be struggling to pay the remaining amount without help. Anyone who has met Ranger knows he is a special dog who has lots of life ahead of him (he just turned 3) and no one is ready to give up on him yet. If anyone has a few extra dollars to help, it would be very much appreciated.