One thing you mentioned stood out for me. I had a carcinoid tumor removed because it began to grow. They also removed 5 lymph nodes. Before surgery, they did a PET. As far as I was told, there were no other areas of concern at that time. When I went to post-op, the surgeon told me I now have more nodules in both lungs. They are small, so he is just going to watch them for now. You said, "Nodules too small to light up on scan." I can't figure out how a CAT scan can reveal more, but a PET (without contrast) missed additional nodules. Is this why? Too small?