I don't understand anymore! I'm finishing radiation for breast cancer. I just had an mri of my back and head, also pet scan and bone density. The lesions are on my vertebra T11 and 7 more. Now my oncologists who's treating me for radiation wants a biopsy for my back. He says he's confused cause the tumor on my breast shrunk but the one on my back grew. I don't know what to think. I'm tired and stressed.