Does anyone know if presence of a clear yellow fluid can be
universally interpreted as a cardiological condition, or can
there be some other condition that could cause that?

The cat was at the vet on Monday, was feeling a little better
yesterday, but today he seems to be deteriorating and appears
to have fluid building up again.  When I picked the cat up
after they drained him, the vet sort of mentioned in passing
that there could be cancer involved as well.

I suppose that I'm in denial about this, and am hoping that
the vet might have overlooked something or mis-diagnosed the
symptoms, and so I hope you understand my despration.

My beloved Rocky may not make it till Friday.  I'm beside myself.