Brian, my husband saw his ENT 3 weeks ago (at that point he had had the sore for two weeks). The ENT was the one that called it a canker sore. He said, as you have mentioned, that it is viral. Could it be that his immune system is still repressed from radiation and chemo and that is why it is taking longer to heal? I talked to my husband about it last night and he said he THINKS it is slowly getting better as it doesn't hurt quite so much now.

Your post has me pretty concerned. Should we call the ENT and insist that he do a biopsy? My husband did say last night that if he worried over every sore he would be a wreck as, since the finish of radiation, he has had maybe one week that he didn't have a sore somewhere.

Thanks,
Anita