Stage 4 likely - what are the treatment options if surgery is not one?

Recently diagnosed from a PET scan that a large nodule, lymph node and some metastatic presence affecting tissues around spine and ribs. No symptoms at all other than a mild diaphragm area pain. With the metastatic nature I am worried about treatment options if removing nodule/lymph node will not help. Any experience from a stage 4 lung cancer in terms of survival rates? Please share any relevant experience that might help me. Thank you