It is apparently quite early in the progression of the disease, so all bets are that he will probably recover. But one never knows. Eeeeeek. I just can't stand to see them in the hospital, all hooked up to iv's and sick, and you cannot explain anything to them.
I'll certainly take your advice and keep it positive around him. This Ambassador of the Kitties (his attitude and coolness have converted a number of cate haters), the Supreme God of Laidbackedness and Loviness, deserves to live forever, as far as I am concerned.
"Sam has no palpable tumors yet, but does have elevated lymphocytes."
Gotcha. Don't care for the elevated lymphocytes but they certainly were caught early. That's in Sam's favor and in yours. Completely understand your concerns about possible treatments though I remain hopeful they'll be less harrowing than you might imagine.
We've owned Siamese for over 35 years. Sam sounds a great deal like our beloved blue point, Edgar III. He was the most laid back, relaxed 'Meezer imaginable. Didn't have to use a carrier to drive him to or from the vet. Nor did we need one in the waiting room as Dobie's and Great Dane's would prance by him. "Ed" was so mellow he made people laugh. I'm sure you're getting the picture.
I mention this because those same qualities translated into making him an outstanding feline patient. He lived with renal failure the last year+ of his life, and may I say he did it well. He'd occasionally have to stay overnight at the vet for a "pump up" of IV fluids. Which, I was told, he took in stride. Minute he was released he'd shake it off, come home, and demand a big dinner. Does that sound like Sam?