Re: is it thyroid cancer or what?????
It's great that they are acting swiftly to take care of this, but you may want to consider seeing an oncologist too (I'm assuming this radiologist is a radiation oncologist)---if this is something rare, you want to have the best people taking care of this. It seems this has nothing to do with thyroid cancer, even though it found it's way to your thyroid.
So sorry you are going through this, take care of yourself, and empower yourself and learn all you can about it, and get the best care.