Hi,
Have you heard about or looked into Cyberknife for treating the liver tumors? It seems to have success rates better than RFA and claims that it rivals or even bests surgery (liver resection). I am looking into it myself, as it is not even as invasive as RFA. It's an exact type of radiation. Tiny gold beads (called feducias- not sure on that spelling) are first implanted into the tumor(s) (by needle, I believe). Then, with up to 5 sessions (sometimes less) are required. The liver is an organ that moves with breathing, which is why they don't do traditional radiation on it. With cyberknife, the radiation beams are attracted only to where the gold beads are. So, even if the patient moves during the procedure, the radiation beams go only to where the beads/tumors are, not onto nearby tissue. These radiation beams are very concentrated and strong. Claims to be able to completely wipe out tumors, benign or malignant.
If you're not aware if Cyberknife is done in your area, just google cyberknife. If you happen to live in San Diego County or near to it, TriCity Cyberknife of Vista is a great place to start.
Best wishes!