I finally got the results of my thyroid aspiration test and the tumor is benign. My worst fear appears not to be coming true. However, I still have to have the left half of my thyroid removed because it's big and isn't getting any smaller. I'm having surgery shortly before Christmas (thanks, Santa, for the early gift of a follicular adenoma), but at least this can be put to rest as an issue before I go home and live an insurance-free life.
One thing about this experience, among the many other things about it, is that it illustrates (yet again, really, this is a lesson I never needed to learn, let alone need repeated reinforcement) that losing weight solves nothing and you can't "earn" good health through virtuous lifestyle habits. Life has been a good deal harder at sub-200 lbs. than it was over 300. Crap still happens. More crap happens because I'm out there more and subjecting myself to medical tests. That's not my way of saying I shouldn't take those tests, but merely a recognition that I was happier when I was ignorant.
Another thing I can say is that at no time was my weight loss in my thoughts about this. Frankly, I was concerned about dying not continuing to lose weight. The surgeon says that enough of my thyroid will remain after surgery that I will not be hypothyroid so I'm not worried about it in any event. However, it would probably be prudent to monitor my weight more frequently immediately after surgery in case all of the slicing and dicing in the area creates an unforeseeable problem.
It was also of interest in terms of my weight loss to know that my thyroid function was not affected by the tumor. That is, I have neither high nor low thyroid function now. So, in the end, my weight was all about what I ate and did rather than my body itself. I already knew that. Now science has confirmed it.
Thanks to Rebecca for the kind note in e-mail. I'm sorry that I didn't reply, but I've been in a really dark place mentally throughout all of this. Functioning at all was difficult at times. I had to take it moment by moment until the outcome was revealed. I really appreciate your concern and that you took the time to write.