Sorry to hear that Nannybob. I can understand you being scared. When I had pneumonia a few years ago, I was scanned as some nodules showed up on the X-ray. When I was told about these, I was terrified as I had had breast cancer 3 years previously and thought it might have spread.
However, a broncoscopy and biopsy showed there was no cancer and the nodules were related to the pneumonia.
I have annual follow ups and the nodules seem to have gone now although one lung is scarred due to radiotherapy.
Let's hope that your op goes well and the outcome is good. Keep us posted. Will be thinking of you.