I would do your research & and find a very good pulmonologist. I have SCLC and the nodule is 3 cm & in the close lymph nodes. It’s also not operable because it’s resting on the pericardium. It doubled in size from the low dose preventative CT scan to the regular CT scan I was given 4 weeks later. The radiologist report recommended a pet scan & biopsy. No one called me about it, so I started calling them because I was scared. Remember, up to this point, no doctor or nurse has even talked to me about these scans. The scheduler kept saying they would call me when it could be scheduled. Up to this point I have had years of good treatment from this clinic, but after a week & a half, I called Mayo (a 2 1/2 hr. dr.). My scans were transferred the next day, and I got a call the day after from a pulmonologist in oncology with an appointment scheduled for the following day which included a PET scan. The Dr was so concerned that she called herself instead of the scheduler. By the next week I had also seen an oncologist, had an MRI, plus other tests. The oncologist wanted to start me on chemo that Friday. I asked for the weekend to think about it since all this in a week’s time was a bit more than I could handle. I’ve since completed my 1st round of chemo, & was scheduled for a double whammy of chemo plus 2 radiation/day in a week. Until, I got a another call this week from a radiology Dr. who said they noticed something on the low dose scan that I had this week for the fitting of the radiation machine. She said none of the doctors knows what it is. So off to have one more scan before my next treatments are scheduled in a week. To be continued….. BUT, in my opinion the ‘wait & see’ approach is only good if you have a very good specialist telling you that, definitely not a GP.