Well, I survived it. Interestingly enough, I was awake and aware the whole time. I thought I'd have been in and out of it, but I remember a lot. I remember joking with the staff, telling my surgeon not to sneeze, and asking, and getting, to see the tumor when they took it out. I was right, it was about the size of a peeled hard-boiled egg.
I'm supposed to be having discomfort, but I really don't feel any pain at all. Perhaps a bit of numb tingling and pulling, but that's about it. I'm not doing any calesthentics, however, just taking it easy and napping.
They tell me I can call in 2 days for pathology results. I'm hoping that's all just formality - they seemed fair convinced it was the "lipoma" - a fatty tumor - that they'd said it would be, and that it's all out now. My back neck doesn't feel lumpy there anymore so that's a good thing.
The surgeon did say that it MIGHT need to be drained out if the empty space left by the tumor fills with water/liquid, but maybe not. I'm just glad it's all over.