Hello - and welcome, Paula ~
I'm sorry to learn of another person having to deal with an acoustic neuroma but I'm very glad you found the ANA website, decided to register and post an 'introduction'.
You'll be receiving many welcomes and some pretty good advice in the posts that will follow this one. As for your doctor's AN removal experience, 100 seems a tad 'light' but is probably the minimum needed to call a surgeon 'experienced' in AN removals, which is a very demanding operation.
My neurosurgeon had over 30 years experience with AN removals and did a splendid job. I would ask your surgeon about his AN patient's post-op experiences. As you have probably learned, AN removals can go well (the tumor is successful removed) but the patient may experience lingering, often frustrating complications. The operation's results cannot be guaranteed but your surgeon should be well aware of the risks and be able to tell you how he intends to minimize those risks. This is what my neurosurgeon did (in answer to my questions about post-op headaches, imbalance and facial paralysis). He was successful in helping me avoiding the problems I was concerned about and I'll always be thankful to him for that.
The doctors experience is very important but so is his empathy with you, the patient. You should feel comfortable and secure with this surgeon opening up your skull and removing a tiny tumor without causing a host of other problems, later. Many surgeons have performed this operation successfully over the years and I trust your doctor is one of them.
Please feel free to post as often as you feel necessary and to ask any question you may have. We're open 24/7 and we know where you are, emotionally, because we've been there.
Jim