Epicardium Cancer, also known as malignant neoplasm of epicardium, is related to first-degree atrioventricular block and constrictive pericarditis. An important gene associated with Epicardium Cancer is TNNI3 (Troponin I3, Cardiac Type), and among its related pathways/superpathways are Metabolism and Metapathway biotransformation Phase I and II.