Hi, Maria - and welcome to the ANA Discussion Forums.
Of course, I wouldn't wish an acoustic neuroma on anyone and I'm sorry to learn that your husband, Frank, has received the AN diagnosis. However, I'm glad you found this website and decided to post. We are supportive and we understand what you and Frank are going through. We've been there.
By now, you probably realize that your husband isn't going to die from this. Fortunately, these tumors are almost always benign although in a problematic location - but they are quite treatable. 5 cm is large (I had a 4.5 cm AN) but we've had AN patients with tumors as large as 8 cm that did just fine. The 'retro' surgery is effective (I had it - with no real complications) and your attempt to go to House Ear Institute is prudent. I hope you can swing it.
Like your husband, I'd been healthy all my life with no real medical issues. Yet, at age 63, I was diagnosed with a large AN. I survived the de-bulking surgery and subsequent radiation quite well and now, as the experience grows smaller in my life's rear-view mirror, it doesn't seem all that traumatic. However, I still recall the initial diagnosis and search for a surgeon I could feel confident with as being a challenge. Fortunately, I found a neurosurgeon highly experienced in AN removal surgery in a nearby city and he did a splendid job. The numerous pre-op tests were tedious but at least I found out that, for the most part, I was relatively healthy, confirming my own belief.
I wish you and Frank a successful attempt at securing your insurance company's O.K. to go to HEI in Los Angeles and of course, we'll be here with information and advice as you need it and, above all, our full support as you venture forth on this journey back to wellness.
Jim