You’ve had good advise so far! As mentioned, you can ask for a fine needle aspirational biopsy under ultra sound guidance at a CCC or CC, usually done by a pathologist was my experience, although at this point, I’m not sure if any would agree, but it’s minimaly invasive. Usually that’s done first, like mine, which showed positivity, and then a triple scope under sedation found my primary. None are 100% accurate, but I’m sure fairly close between them all. As my cancer was found in the tonsils, if not, it wouid have been an unknown primary since cancer was proven in the lymlh node. A primary can be difficult to find in the tonsil crypts or die off at the primary when it metastasizes to the lymph nodes, taking all the nutrients with it, but maybe a small residual of dead cells are left behind, but I’m not completely sure though. Sometimes it’s the other way around that cancer is found in the primary, and not the lymph nodes.

It’s correct that it’s not cancer until proven otherwise, and that’s by biopsy. There are so many other oral conditions it can be other than cancer.

Good luck!