I would be inclined to ask an oncologist whether it is important now to understand if the adrenal mass is primary or secondary? It’s a common destination on the metastes highway, and the PET lit up. So time seems precious. But there are a lot of non-dangerous reasons a mass can light up a PET.

You can function normally with a piece of one adrenal gland. But if you want to keep for now,
the biopsy attempt needs to be repeated. Can they do a robotic attempt?