I think I would wait until your vet came back into town and see what s/he says. I'm sure this vet is certainly qualified, I don't mean to imply otherwise, but when my Puddy was near death, she had a mass that a vet said was cancer. I said "Are you sure????" and he said "Yes. It can't be anything but cancer." He wanted to operate and I insisted that he call my vet, even though my vet was spending time w/his sons who were home from college. I posted about this when it happened so I won't go into it again but Dr. Lee changed his plans, came in and performed the surgery. Here's the point, though: what the other vet thought was cancer wasn't cancer at all. It was Puddy's kidney; the kidney had literally burst. No cancer. Yes, surgery was absolutely necessary but that vet told me that he may get in there and see that Puddy has cancer everywhere and would have to be PTS on the operating table. It took my vet's expertise to correctly evaluate the situation and do the correct procedure. I don't hold it against that vet; he said what he thought was the case but I trust my vet completely and I somehow knew that he was the one who would give it to me straight. You have some time til your vet comes back, correct? If you have total trust in him/her, I'd let your vet make the decision. Good luck. I know how tough this is and we're saying prayers here that you have lots of quality time left w/Mr. Meow.