Thanks for your input. As I said, the articles I have found online only describe the procedure in the most basic terms, or are more technical than is of use to me. As for my radio oncologist being involved, he was a single doctor practice and retired years ago. As I have not had a reoccurence, I have not sought out a new one. The oral surgeon that pulled my wisdom teeth prior to radiation is also retired, so his insight only comes from what notes he left in my records. My GP from the time is still practicing, but he has moved. He is really the only involved doctor that is still practicing. Even the eye doctor they sent me to for a baseline is retired.