IL6 and lung cancer: Other parameters closely associated to the inflammatory response which also have been evidenced to play a prognostic role in cancers could be considered such as neutrophil/lymphocyte ratio, platelet/lymphocyte ratio, lymphocyte/monocyte ratio, and interleukin-6.(4) The identification of novel serum biomarkers in lung cancer by proteomics and metabolomics is essential and may help to further refine predictor tools.