Yes David, I am aware of that. In my dad's case, this was his re-radiation due to recurrence and that too unilateral (60 Gy one side of face-neck).

And being his second time with radiation, probably he may have more difficulty during the 2-3 week.

Father; 67 yrs; RIP: 2012/05/26

TX:SCC pT2N1M0G2;Glossectomy+SND+CCRT(59.3Gy+6xCis.)[2009]
TX:Nodal Mets; 3xDCF[2011/05/05]
TX: RND + PMMC Flap[2011/07/11]
DX:SCC PNI+ECE
TX:Re-RT 60Gy[2011/09/21]
TX:Gefitinib 250mg[2011/12/18]