Hi Mary and welcome! I see you are making yourself at home here and truly looking forward to your further participation here
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Lori is certainly correct as it pertains to most radio AN treatments (regardless if GK, CK, Proton, Trilogy, FSR, etc). Most radio treatments on AN's occur if the growth is smaller than 3cm (however, I have heard of them performed over 3cm, but unaware of outcomes post treatment).
As one who suffers from FMS and has positive read for anti-ANA (nope, not the headbooger AN but anti-ANA), I found, for me, post CK... fatigue was the worse. My sister also has systemic lupus and know that her pain levels are the worse. My FMS pain levels did not enhance post CK but the fatigue did set in..... if you do a search option here for "Brain Tumor and Fatigue Brochure", you will find a link to a .pdf brochure, written by Dr. Peter Black and Nancy Conn-Levin discussing fatigue and brain tumors in general... regardless if malignant or benign, it discusses fatigue issue for BT patients and ways to counter-act it.......
Derek is correct about the percentage of success rate for CK and GK. Cross reference to these percentages for both protocols can also be found in discussions in the "Brain" section of the CK Patient Support board (some docs that volunteer their time there to answer patient questions perform both CK and GK, so a good resource if radio-treatment is being considered). The link to the site is:
http://www.cyberknifesupport.org/forum/Since the success rate is very high for CK and GK, there are only a handful of those that have had to endure treatment failure. I do know of one that participates on this site that had CK failure (One of only 5 in over 10 yr span.... my understanding is she opted for microsurgery after the CK failure... the others re-CK... which is possible. ANA has also confirmed some GK treatment facilities -- as noted in their March 'NOTES' newletter -- are also re-GK on failures, but success rates on re-treatment unknown to me.)
Regardless of what you decide... truly..... I welcome you, I cheer you on and want you to know that I am glad to see you here.
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Be well,
Phyl