From the lack of response, it doesn't seem this is a typical treatment. I'm not sure if it's new, or unconventional, or perhaps a last resort.

I don't believe radioactive seeds are involved. From what I understand, this procedure involves aiming a megadose of radiation at the site where the lump will have been removed beneath his chin. The really disheartening thing is that a special operating room with leaded walls must be used--and one is not available until Sept. 28. So he has to wait all this time while this aggressive cancer may appear somewhere else in the interim.