IL6 and cancer: Environmental stimuli, stress or diseasesmay trigger the release of these proteins in a ripple effect for theactivation of the immune system and/or various metabolic pathways.1,2 Cytokine monitoring can thus be used to track progression of, e.g.,infection, cancer, and acute or chronic inflammatory processes.3−5 Interleukin-6 (IL6) is a low molecular weight glycoprotein thatbelongs to the family of cytokines.