Brooklyn Bridge, your account of the original surgery is quite confusing, as asked by others but not answered yet. It might just be a terminology issue.

From what I am reading into it, your surgery did not involve removing bone from your arm and using that to rebuild the jaw. They used a flap created from the forearm and grafted that skin into your mouth. That flap is now where your recurrence is located. Am I understanding that correctly? A comment was made that seems to infer maybe having bone cancer from implanted bone from your arm. I know we use different words here than other countries.

Do you remember the name you used here previously?

As far as the teeth, as Gloria pointed out, you would need what we call here a dental oncologist to do a thorough evaluation as to what teeth may be an issue prior to radiation/chemo.

Over the years there have been a few folks here with squamous cell carcinoma of the skin after treatment. Some even around the PEG insertion site. I have often wondered if it was related, but all the doctors have ruled it out.

Best wishes for smooth sailing!