I always have structures show up in my liver that were characterized as lesions in the ct scan report. A PET scan always shows no uptake, so I don't worry about it. They have been noted since 2003. I also had an ultrasound that identified two echogenic cysts in my liver, but the PET scan never picked them up. That was in 2003 also. I have had numerous PET/CT scans since then and they are not remarked on. They may be hematomas, benign.
I never had my liver biopsied just to make sure. I have heard of one person who had mets to the kdney from lc. Perhaps your husband should travel to a province that has a PET/CT scanner and investigate. I always thought that slicing and dicing my lung was good enough. If the PET scan shows no malignacy anywhere else, that is good enough for me and apparently the docs were satisfied too.
Don M