Poor Jasper.

I totally understand how you feel 'rock in a hard place'. I would feel the same way given the situation.

None of us can tell you what to do, but since you asked what would I do if he was my cat, here goes.

I'm a fan of biopsies so I probably would have had it biopsied back in the summer when they found the lump. That doesn't help you now but just saying that's probably what I would have done there.

As for what's happening now. The suspicious spots on the lungs makes it more difficult. I'd probably have another x-ray done just to see if there has been any changes in the week since, that would answer alot of questions if there were changes there. If it spread I'd be more likely to just opt for making Jasper as comfortable as possible for whatever time he has left. I agree that it would be difficult to opt for amputation if he would still have cancer in his lungs regardless of what his age is. If the x-ray showed all clear and the vet thinks that there isn't cancer anywhere else, and gives a fairly positive prognosis for post surgery life, then I'd have to give it some serious thought to amputation if finances were available.

Basically for me it would come down to what the vet sees on the second x-ray, and the vet's opinon on quality/quantity of life for me. Depending on how well the vet is trusted, a second opinion might be an option if nothing else to confirm the diagnosis and prognosis or give you other options so you're not kicking yourself a year or so later wondering 'what if'.

Thoughts are with you and Jasper as you struggle with this. *Hugs*