RESUMEN

Chronic lymphocytic leukemia (CLL) is the most common hematological malignancy in the USA. Extra-medullary disease is very rare and is not well characterized. In practice, clinically significant cardiac or pericardial involvement by CLL is extremely rare with only a few case reports in literature. We report a 51-year-old male patient with a past medical history of CLL in remission, who presented with fatigue, dyspnea on exertion, night sweats and left supraclavicular lymphadenopathy. Laboratory investigations were notable for leukopenia and thrombocytopenia. Due to high suspicion of an underlying malignant process, a full body computerized tomography (CT) scan was obtained and showed an 8.8 cm soft tissue mass-like lesion occupying the majority of the right atrium and extending into the right ventricle, with probable pericardial involvement. Enlarged left supraclavicular and mediastinal lymph nodes were also present and had a mild mass effect on the traversing left internal thoracic artery and left pulmonary artery. A transesophageal echocardiogram and cardiac magnetic resonance imaging (MRI) were done to better characterize the cardiac mass. They confirmed a large infiltrating mass (measuring 10 × 7.4 cm) in the right atrium and ventricle, extending into the inferior vena cava inferiorly and coronary sinus posteriorly. A left supraclavicular excisional lymph node biopsy was performed and histopathology was consistent with Small Lymphocytic Lymphoma (SLL)/CLL. This case represents one of the few known cases of cardiac extramedullary-CLL presenting with an isolated cardiac mass. Further studies are needed to characterize the course of the disease, prognosis and optimum management along with the role of surgery.