Thanks to everyone who has posted. I have just been told that I am now clear of cancer and I don't need radiotherapy - so no PEG tube. I suppose that makes me now a "survivor" rather than a "patient". Looking around at some of the postings on this site I think I have been extremely fortunate.

removal of primary tumour in mouth, left neck dissection, flap surgery - artery from wrist to mouth - skin graft from thigh to wrist - March 2007 (age 45, lifelong non-smoker)