[Pericardial tamponade and third-degree atrioventricular block revealing a primary cardiac lymphoma].

Secondary and primary cardiac tumors are rare, and primary cardiac lymphoma are exceptional. We report a 78-year-old non immunodeficient male, with pericardial tamponade and third-degree atrioventricular block. Analysis of the pericardial fluid and tissue was not contributive. À transvenous biopsy of the cardiac tumour revealed non-Hodgkin large B-cell lymphoma (CD45+ CD20+ CD3-BCl2+). Therapy is based on chemotherapy. However, prognosis remains poor for this type of tumor commonly revealed by a pericardial effusion.