As we wait, I grabbed a copy of all three of the most resent MRI scans (I keep copies of everything) and we shipped them to an independent radiology reading facility that we've used in the past. Hopefully they can give us more information about what's going on in my brain.
It's always hard when doctors don't agree about your condition, but (as a few people mentioned) it's better than a definitive recurrence. That implies it must not be obvious growth. Either that or someone was asleep at the wheel.
I'll keep you guys posted on anything we find out along the way.