Jane -
I searched on both Dr. Seidman and Henry Ford Hospital but didn't come up with any posts on the Forum. But that doesn't mean a whole lot - lots of AN patients don't access the forum.
As Clarice pointed out, with an AN of 1.5 cm your husband should have the option of watching & waiting (at least for a time), radiation, or surgery. The location of his AN may have some bearing on this.
He should make sure he consults with a doctor who does radiation & surgery, or doctors who do radiation, and doctors who do surgery. Basically he wants to cover all his bases because docs who only do surgery tend to recommend surgery and docs who only do radiation tend to recommend radiation. He needs a well-rounded opinion (or opinions).
AN treatment is a personal choice - what is right for one patient isn't necessarily right for another. I personally chose surgery and it was a great choice for me, but others who picked radiation as just as happy with their choice.
If your husband does choose surgery, mid fossa will give him the best chance of saving his hearing - if it's worth saving.
You should contact the ANA for their (free) informational brochures. You'll find info on the main web page. The brochures are full of wonderful, helpful information.
Good luck to your husband on his AN Journey - making a treatment decision is often one of the biggest hurdles he'll face. It's not easy, but he'll get there.
Best,
Jan