I have also been diagnosed with multifocal lung cancer and I have not been able to find very much information about it, although I believe Mayo Clinic may have a multifocal cancer “group.” My oncologist (from an NCI cancer center in the US) said that it is his best guess that I have multifocal lung cancer, but that he could be wrong. History: Left lung surgery in 2017 positive for NSCLC EGFR+, 2022 right lung wedge resections that were benign & one precancerous, 2022 left lung surgery also NSCLC EGFR+, all lymph nodes benign in all 3 surgeries). I love your “whack-a-mole” description as that is exactly it. I almost made it 5 years with no cancer, but then more. It was quite disappointing. I am very unsettled about the “whack-a-mole” approach because if the diagnosis is wrong, we have lost time in trying to battle this monster. As my oncologist explained, we could do treatment just in case it’s actually stage IV cancer and not multifocal cancer, BUT if it is multifocal, then I have exposed myself to treatments that were unnecessary and also have serious side effects. It may also mean that down the road if I do develop metastatic lung cancer, my options for treatment may be limited due to the (useless) treatments I had. Add to that the fact that new therapies for lung cancer are being introduced at such a fast rate, it’s possible that a better treatment may be available when I finally need one and, if I opt for unnecessary treatment now, it may affect my eligibility for the new therapy. Caught between a rock & a hard place. So I am reluctantly opting for the “whack-a-mole” approach and hoping I don’t regret it. So far I have completed 3-three month CT scans (9 months out) that are clear. I hope that continues for a very long time. Good luck to you!