A Patent Foramen Ovale Grants Cardiac Output Over an Obstructive Primary Cardiac Lymphoma.

Primary cardiac lymphomas are extremely rare and involve mainly the pericardium. We present the case of a 77-year-old man with a germinal center diffuse large B-cell lymphoma causing severe right ventricular inflow obstruction. Clinical presentation of isolated dyspnea and severe desaturation and cyanosis were, otherwise, unexpected. (Level of Difficulty: Beginner.).