I just updated a similar topic in this topic with our thoughts and results. "Recent Diagnosis - trying to help on DR decision"
House clinic in LA, 200+ AN / year, many surgeons.
Dr Gantz Univ of Iowa 70-80 AN / year (half are middle Fossa)
U of M, 4 Middle Fossa past 6 months, I think it was 10 total AN past 6 months, Call them, they will tell you.
Mayo , Driscoll/Link won't tell numbers, from published med journals in 2002 (in Member section), I think it was 2 middle fossa in a year.
We liked Dr. Gantz in Iowa City. About 5hour drive from Twin Cities.
Your health, current symptoms, age and insurance coverage now and in the future are additional factors to consider.