Re: Confusing thyroid FNA
An fna only gets a sample of cells, it's not diagnostic in itself, just a tool that you combine with other tools (ultrasound) to determine if you should have surgery---only removal of the lobe actually gives you a diagnosis for sure.
The "hurthle cell change" was one red flag (the cells are mutating) as well as the fact that this has grown---and grown quite large. Sometimes, even though these are benign, they grow out of control, and can wrap themselves around the structures in your neck.
I think the surgery is a good idea, but you should be with a surgeon that explains things to you, and gives you confidence, and is very experienced doing many thyroid surgeries per week, you don't have to rush, you can go to get another opinion or two in the meantime.