I've been thinking about taking him to another vet locally to get a 2nd opinion. My husband has great confidence in this one though - and agrees with her about the chemo. To me, the symptoms seem a little vague to have such a quick and definite dx. I don't know how expensive a biopsy is, but at least then I'd know. This off & on blindness throws me. He had the 1st incident a week ago, then he was fine. Then yesterday he was blind in one eye. Thanks for the information. I still have to digest all this. And while I can find plenty of info on the web for human problems, I'm finding very little for pets. Again, thanks.