Anne Marie... Wow. I've never heard of giving a tumor room to grow! Isn't the idea for it NOT to grow? The only reason I've ever seen for removing part of the skull would be to allow for swelling, that way the brain, if it swells, isn't pushing on the hard bone, causing more damage. I used to work in the neuro unit of a trauma center, and they did that a lot with traumatic injuries, like car accidents and falls, but I've never seen it done to allow something that shouldn't be there in the first place room to grow. I don't know much about facial neuromas as opposed to other types, so it's very possible this is normal, but it sounds strange to me.
As far as sending it off to be biopsied, don't be worried about that. If you have anything removed in a hospital, it all has to go to be biopsied. That's just standard procedure. I had my wisdom teeth out in a hospital and they had to send them to pathology too. Turns out they were wisdom teeth - gosh, who knew? Glad we spent all that extra money for the pathology lab to give us that expert opinion. I think a 5 year old could have looked in the jar and told me that.
If you and your husband notice changes, I'd have it checked out. If it's nothing to worry about, I know i'd feel better hearing that from the doctor. And if it's something that needs to be addressed, it's better to know that now.
I hope you get to the bottom of this. It must be really frustrating!
Lori