so happy for you having found us although, so sorry to hear about your Dad. Several CC patients have been treated with Cyberknife and you can read up on some of the discussions by entering "Cyberknife" under Search although, I suspect of other members wanting to answer you, personally.
In fact, you will be pleasantly surprised by the outpouring of help coming your way.
Wishing for the absolute best,
THIS INFORMATION IS NOT INTENDED NOR IMPLIED TO BE A SUBSTITUTE FOR PROFESSIONAL MEDICAL ADVICE. YOU SHOULD ALWAYS SEEK THE ADVICE OF YOUR PHYSICIAN OR OTHER QUALIFIED HEALTH CARE PROVIDER