Thanks Sue for the detailed response. Docs have been putting all efforts to help him get through this. I am also hoping that my dad has good quality of life after the treatment. Ofcourse, his teeth also may not survive the second onslaught of Radiotherapy (already in bad shape). He may not like the idea of PEG though, if it is required at a later date. Since it is going to be unilateral RT, hoping that it will not dry up his remaining salivary glands.