I did a super-speedy Google search and found this:
https://www.cancer.org/cancer/types/pancreatic-cancer/treating/ablative-techniques.html#:~:text=Radiofrequency%20ablation%20(RFA)%20uses%20high,and%20destroys%20the%20cancer%20cells.

There are ablation techniques, but the article says these are rarely used in pancreatic cancer (I don't know why) and uses only the term tumor, not lesion. That makes me think that these techniques are most appropriate for a tumor that's self-contained and hasn't spread, which, to me, wouldn't include lesions. But again, I'm not a medical professional. You might ask your PA friend if this is what they're referring to. Perhaps someone on the board who's had this done or who's considered this will chime in with better info than I can provide.