Mine didn't light up on pet either. I was so relieved at that point I wanted to hug the doctor but it was in the middle of covid. I'm wondering why tgey wan to do a biopsy on me. Might as well just get it out and test it then. I'm not a doctor though. Hopefully things will be clear for me as well. Nothing has been seen anywhere else in my lungs. Just the lower right lobe. I hope your future scans come back clear. Thank you for the time you've taken to respond it helps me keep calmer.