My father has advance stage of metastatic non small lung cancer and doctor told only chemotherapy is d option. His weight is only 43 and he is around 72 years age and we do not want chemotherapy at this age. We heard about immunotherapy is also available in india which even treats the advance stage cancer. Could you please let me know where to approach for this kind of treatment and where? Or anything else can be done? Currently he is taking aayurvedic medicine. I have all the reports available with me including biopsy and FNAC. Please help me to get the answer. Thanks in advance.