Introduction Thymomas are rare epithelial tumors of the mediastinum frequently associated with paraneoplastic diseases, myocarditis on the other hand is a rare complication in patients affected by thymoma. Polymyositis and myocarditis associated with thymoma are exceptionally rare conditions and are usually accompanied by myasthenia gravis (MG). Myocarditis, an inflammatory disease of cardiac muscle, may result from a wide variety of infectious, toxic, and autoimmune origins. Although the course of the disease is usually self-limiting, acute, non-fulminant myocarditis may progress to […]