Paul

As you can see from my signature, I had 72GY the first time and was told then, the safety standard was 77 max for all radiation TX total. But when my radiation oncologist saw the pathology report of perineural involvement (PNI)on the recurrence, he said that Cyberknife has a much better focus than IMRT so he could safely target the tumor area without too much additional radiation damage to the already irradiated areas.
Plus with CyberKnife's accuracy they can increase the amount of radiation. With IMRT, I got an average of 1.8 GY for each of the 40 sessions. With CyberKnife, I got an exact whopping 5GY a session for only 5 sessions although each session was one hour. Plus the Cyberknife moves around continously that entire one hour to bombard the areas with about 12x more angles each node than IMRT can manage.
It cannot hurt to ask your radiation oncologist about CyberKnife although it is more commonly used for prostate and lung cancer and brain cancer due to it's accuracy and ability to stay centered on a tumor despite the patient's breathing or swallowing during the session. My TX was at a CCC; the Lombardi Cancer Center in Georgetown hospital in DC

Charm