IL6 and atherosclerosis: In addition to the macrophage content, there are also other circulating inflammatory biomarkers that determine a relationship between arterial 18F-FDG signal and inflammation, such as for example C-reactive protein (PCR), interleukin-6 (IL-6), selectin -P-soluble, selectin-E-soluble [30, 31] and these data confirm relationship between inflammatory process and progression of atherosclerosis disease.