Increased epicardial and pericardial thickness can be observed on echocardiography of patients with myocarditis and has been attributed to an increased amount of epicardial adipose tissue (EAT), a highly inflammatory reservoir with dense macrophage infiltration and increased levels of proinflammatory cytokines, such as interleukin 6 (IL-6) [107]. Here, IL6 is linked to myocarditis.