I have a question I have had cancer two times, the second time radiation was done. I was told that radiation can be done to the same area only once. I am waiting for a biopsy result, this would be the third time for cancer, if it is back. Is that true radiation to same spot only once? thank you

SCC 2005 floor of mouth and neck disection
SCC 2009 partial rt tongue RAD
PEG 2009
20 HBO treatments following surgery of three teeth and 10 more HBO to follow
2015 Diced food diet due to weak muscles long term effects of radiation
2018 Radiation Fibrosis of the jaw and neck, vocal cord dysfunction