Primary cardiac non-Hodgkin lymphoma presenting with atrial flutter and pericardial effusion.

The article presents the case of a 58-year-old immunocompetent man who was hospitalized for cough and dyspnea. Chest radiography showed an enlarged cardiac profile and computerized tomography indicated a large intra-pericardial mass in the sternum and ribs. The patient was then diagnosed with diffuse large B-cell Lymphoma, immunoblastic, with activated B-cell phenotype. The patient's condition showed improvement after chemotherapy under the CHOP-Rituximab scheme and pegylated filgrastim.