Diagnosis and treatment complications of primary cardiac lymphoma in an immunocompetent 28-year old man: a case report oleh Maria Bonou, Chris J. Kapelios, Athanasios Marinakos, Stamatis Adamopoulos, Panagiotis Diamantopoulos, Periklis G. Foukas, Loukas Kaklamanis, Penelope Korkolopoulou, John Barbetseas, Nora-Athina Viniou