Angelia

My doctors don't even suggest a PETscan anymore due to the false positives and negatives they have seen with mine. At least for base of tongue cancers, I've seen figures of 50% error rates .
Why, because a PetScan cannot differentiate between your tongue healing itself at a rapid rate or a cancer tumor. Worse, it can give you false assurance that all is well and miss the slower sugar uptake of the tiny tumor recurring. All of that has happened to me. The CT and MRI have always been accurate though. If your MRI is clear, it's unlikely your cancer is back.
Charm