Dan

Oh no, right before your daughter's rescheduled wedding!
I'm not going to tell you not to worry because I'd be a hypocrite since I worried about every Petscan & MRI, and still do. As far as any foreshadowing of the recurrence, in my case within a year of finishing radiation & chemo, my wife noticed that I was having more and more difficulty eating certain foods plus starting to drool a little bit. My ENT could feel a lump with her finger so clinical exams do work.
The odds are certainly with you that this is a false alarm since Petscans after base of tongue cancer have an even higher rate of false positives than their 47% error rate for all oral cancer. At 90 days, SUV uptake is high for recovering tissues with no cancer. Keep us posted and we will keep our fingers crossed for you.
Charm