Please understand that we are fellow patients/survivors and caregivers without medical backgrounds. While I try my very best to help answer questions based on what Ive learned over the past 8 years here, I have not had any medical training or education. So please always also check with your treating physicians as well.
When adding chemo to radiation for treatment of oral cancer it helps the radiation to be more effective. I think Ive seen somewhere that it adds 10% better results than rads alone.
I believe here in the US, doctors go by a flow chart put out by the NCCN (National Comprehensive Cancer Network). On the main OCF site we have page after page of very detailed info about this. I thin there is also a link to the NCCN site. This probably would be a very good start to learning more about how treatment plans are devised.
OCF Main Pages, Treatment Guidelines and NCCN Info Best wishes with everything!