Thank you so much for your reply and for the helpful recommendations. He is seeing the dentist specialist today and hoping his assessment gives him the all clear to start treatment. I will be by his side all the way, and encouraging him to push through. Knowing what to look out for is powerful for me. So happy for your all clear. When will they do your PET scan. I understand they have to wait for a period of time after your last radiation. Do they do CT scans along the way during treatment?