Mamacita,
I agree with Foo above. Chemo is rads helping hand. The tumors in my neck were extracapsulated so chemo was required as a mop up for any stray cells that may have been on the lymph highway. I'm surprised based on the size and location of your tumors that the RO is recommending rads only. All it takes for a recurrence is one cell taking hold. Chemo get's those little hiding buggers away from the primary site.
Good luck with the consultations!
Positive thought and prayers
"T"