Hi, Thanks for writing in. Since your mother has been diagnosed as NSCLC with lymphnodes and secondary to the spine, this is stage 4 cancer. Unfortunately stage 4 NSCLC carries an extended survival of 2 years and eve n with most aggressive therapy, few patients outlive this period of survival. There are also other problems like pneumonia, weakness, loss of appetite and the stress of chemotherapy which is affecting her general condition. Cancer chemotherapy must continue till the end with adequate care of pain relief measures. She should be given high protein liquid diets of her choice at regular intervals to help maintain her energy balance. During chemotherapy, there is a lot of destruction of the cancer cells and these circulate in the blood leading to further weakness. With expected respnse to chemotherapy and good support, her survuval might be ectended to 6 months to over a year. Please do not worry.