I literally have about 5 minutes to write, so I'll update you quickly now, then more fully later.
Bottom line is: the ultrasound was inconclusive, which isn't bad. They saw the area in my liver that the PET scan noticed, but it was very faint and hard to find. It's in an area of my liver that's too hard to biopsy, so my oncologist has advised us simply to wait til my next PET scan (3 months or so) and we'll see if the spot has changed or grown in any way.
I forced him to give me some numbers and he felt there could be a 75% chance it's just scar tissue.
In my favor: they've seen the spot before in several PET scans, so it isn't new and hasn't grown. The only reason we are talking about it is that in this last PET scan, it lit up (although only faintly). Perhaps in my next PET scan, it won't light up at all anymore.
If it DOES turn out to be cancer, we caught it very early and it won't have grown much by the next PET scan.
I should also point out that my doc is very conservative and very aggressive. He's being pretty calm about this, so-- so am I.
With all these facts-- I DON'T THINK IT IS CANCER. I feel like I'm still in remission, and I plan to celebrate this holiday season accordingly!