@debsid Mayo has contacted me about a study that is at stage 2 of the study. My oncologist told me that means they are done testing on animals and are trying to determine what dosages to use. When they finish stage 2 testing, they will then test the effectiveness of the procedure. The way I understand it, you are given a drug that makes your body hyper sensitive to light. They then use an endoscope to shine a laser on your tumor. The last i heard, this study was on hold due to covid.