Good question! I am just recently diagnosed, scheduledfor PET scan next week to help determine next step. If my choices are watch & wait vs. treatment, I think I would push for treatment (because I have a retroperitoneal mass that has taken out one kidney and I would prefer to stop it before it affects anything else — there’s a lot of important “stuff” in that area!) what would be the advantage to watch and wait (other than avoiding the ordeal of treatment)?