Sorry for taking so long to report back with some results. My laptop broke and was not repairable. I've been around the circle of another MRI, visit to the oncologist. And today, a follow up exam by the ENT. And all the results are good!

Thanks for members relating their stories of past PET scan false positives. They certainly helped me to keep my stress level down. I can now confirm from personal experience that a small level of increased activity in the scan is not conclusive of any problem.