Matastatic lung cancer to spine

My name is Jennifer. My mother was diagnosed with Lung cancer in March 2002 because it had metastasis to her left arm and broke it. She began extensive radiation to alleviate pain. She started Chemo and due to pain had to go back to radiation. This last round of radiation was for the metastasis cancer to her spine. This time the doctors feel she has spinal cord compression or nerve damage however they can't be positive yet. We are now in a catch...If she can't walk she will not be able to have Chemo, but if she doesn't have Chemo she will only get worse My family and I are trying to be positive. Is there anything we can do? We are going to keep going with physical therapy...is there anything else?