Let me back up a second...I had surgery at Methodist Hospital in Houston, Baylor University. TRAINING is a big deal! My neuro surgeon had a resident with him. My doctor had a resident with him who was 6 months away from being board certified and he actually did part of the procedure. There was at least 1 other resident there who is a doctor in the Army just starting her training...I hate to be a male here, but she was pretty easy to look at. She was with me in intensive care and did daily follow up with me in the hospital. When I had my BAHA surgery done, a resident did all of my pre-surgery prep, and was present for the surgery. All of these docs were already ENTs, already highly trained.
I won't go into why I had surgery, but there is a much higher degree of difficulty in the surgery than the radiology, and I would be much more highly concerned about the numbers of surgery the doc has done, rather than the number of radio surgeries someone has done. So few of us have ANs, that if your doc has done 100+, he has done a lot of business. If we are 1 out of 100,000, he has treated all of a city the size of New York. I wouldn't worry lose a wink of sleep about your doc.