Hi ceecee and welcome. I knew our battyprincess would help (as has Dealy and Lorenzo). Lorenzo's reference to the Cyberknife Patient support board would probably be (also) very helpful to you. There are doctors there that treat AN's with both, GammaKnife and Cyberknife. They volunteer their time there to help answer our questions.
In regards to Cyberknife and GammaKnife, I can share with you this:
1. Gammaknife has been used for over 35 years and has a great track record in treating AN's
2. Cyberknife has been around for over 10 years and thus far, in the 10 years, the track record is also great
3. Gammaknife uses a metal head frame to secure the head during treatment. It is a temporary discomfort (from what I hear, the happy pills work great during it's "application" to the head). It is bolted to the skull. Please know that it is important for the headframe to be calibrated before each use and it's up to us patients to make sure we ask treatment centers about its calibration. For Cyberknife, use of a plastic mesh mask is used to secure the head in place during treatment.
4. GammaKnife is a one dose treatment (I have heard of fractionated GK at a couple of facilities but have no background on its effectiveness in the treatment of AN's). Many find that the 1 dose (day) treatment conforms to their lifestyle and is only a one day option. Cyberknife is fractionated over a period of (typically) 3-5 days (mine was 5 but I know many that had 3 day).
5. Data shows that both, GammaKnife and Cyberknife, are both exceptional choices of radiosurgery for AN's under 3cm in size. Both are proven in efficacy.
6. Both forms of radiosurgery pretty close in its accuracy in target hits (approx .87mm for CK, GK just a hint different at just over .87mm). Accuracy is key in both treatments as you want to make sure you hit the dang thing.
7. Failure rates in both, GK and CK, are extremely low, based on current data.
8. Side affects run about the same for both forms of treatment. I have heard some note post-GK head issues from where the headframe was anchored, but those issues noted have been minimal (sensitivities, etc in the bolt area). Hearing preservation has run (typically) within 5-7% of what hearing was at time of treatment. Some report (for both forms of treatment) balance issues, slight hearing loss, enhanced tinnitus immediately post treatment, but subsides over time.
Overall, this are just brief thoughts on both forms.
For a good, overall reference/resource for Gammaknife, you can use this link:
http://www.irsa.org/gamma_knife.htmlFor a good reference resource for Cyberknife, you can use this link:
www.accuray.comWell, enough of my rambling, but I hope this helps just a bit. Please keep an eye in the Radiosurgery forum here on the boards.. ..lots of personal experiences in all forms of radiosurgery noted by many radiosurgery AN patients.
Anyway, welcome... we're here for you
Phyl