Hi Guitarmn and welcome.
I will speak from patient experience only.
I am almost 4 years post-CK for my 1cm AN. Prior to my CK, I had over 90% of my serviceable hearing. Today, almost 4 years later, I have maintained that hearing level (of over 90%).
Balance and tinnitus are issues with me, prior to CK and post CK.. however, I have other medical ailments that (the docs believe) are the key reasons for my balance issues.
I had my CK done over 5 doses/days. By "fractionating" the treatment, the sense is that it helps with overall hearing preservation.
MaryBKAZ (a user on this site) had CK done in 1 dose due to extreme low hearing levels prior to treatment. Many have it done over 3 days, etc. Each CK treatment team/facility will discuss their suggestions to you, based on a number of items, such as hearing level at time of treatment, location of the tumor, etc.
I suggest a good read at the CK Patient Support forum (
www.cyberknife.com). Radio-oncs that perform all kinds of radiation (including CK) donate their time to answer patient questions. They are very familiar and supportive of the ANA Discussion forums and are very helpful, insightful and yes... they even show humor from time to time! (human... nice to see it in a doc!).
I will be having my 4 yr CK follow up this Feb (as well as my hearing test). There are other forum users here, such as Mark (he is now 8 yrs post CK for his AN), MaryBKAZ, Sgerrard (a forum Moderator like myself) and many many others that have had the treatment successfully.
As with any medical treatment, outcomes are not guaranteed, risks involved but I am a firm believer of being the best, well-informed patient you can be so please take your time in doing your homework. We, as patients on this site, can share our experiences and what knowledge we have with you... the docs on the CK patient forums can share professional inputs... and as Jan is noting...if you are in CA, Stanford is definately the place out there to have CK.
Wellness wishes to you.. and again, welcome.
Phyl