Village1, I also have kidney cancer found incidental to another problem, and at the same time, a questionable spot on my right lung. I was referred to an Oncologist, and she thought I would benefit from radiation. It was done over a period of three weeks (not every day), but there was little change three months after the radiation. She suggested that I have a MRI in six months as follow up. I have had an MRI every six months since the radiation, and the tumor has not grown or metastasized. I will continue this regimen until something changes. It may never change, and realistically, at my age I will likely experience a natural death.
My lung cancer, unrelated to the kidney tumor, was treated with radiation and appears to be taken care of. I need to have a CAT every three months for two years for follow-up. So far, so good.
All of that said, I would suggest that you visit an Oncologist and get their opinion, and perhaps a second opinion as to a treatment regimen that you will benefit from. Your primary care provider may be able to refer you. I know it is scary, and wish you good luck.