I also have right-sided pain under ribs post tx, it feels like slightly painful bubbles ! Constant and annoying, like wind but not in the stomach, I have it now.
I've had US scans (albeit on very old machines, operators said it was hard to see!) and the excellent LiverMultiScan, nothing showed up.
Like Fitz, I had some other issues that suggested abdominal aorta symptoms too, I had a strange pulsing thing, a longish story which I won't go into now, but again, USound didn't show anything (slightly better machine) - GP ran heart checks, said all was well.
From what I have learned, Gallbladder and gallstone problems can radiate to your back and can be like a kind of itchy tingling feeling, that can become more painful and at worst, agonising.
The other thing I would suggest is, have your lungs checked. We have a few organs in that area !
Hepatologists only seem interested in the liver, not what's connected, as is their speciality, but they should either refer you to a Gastro or offer scans. When you see the size of your liver, eg in the liver multiscan, you can see why if it's in trouble how much more trouble that could cause if not functioning properly! I do think if patients have carried the virus for many years, there should be a thorough check-up post treatment, after all, these wonder-drugs are designed to kill the virus, not fix up the rest? Of course, getting rid of the virus will improve things and prevent further damage, but not be a cure-all for damage done from living with it for a long period of time?
I will state the obvious in that I am not a Dr, but I sure have learned a few things over the past year or so, like most of us! I have always felt the best medicine preventitive, failing that, investigate early...why not be thoroughly checked out after living with a serious cronic condition for a long time? It makes sense to me anyway.