Plasmablastic Lymphoma of the Small Intestine in an HIV- and EBV-negative Patient.

Plasmablastic lymphoma (PBL) is a rare aggressive B-cell lymphoproliferative disorder that is strongly associated with immunodeficiency, most often with human immunodeficiency virus (HIV) and Epstein-Barr virus (EBV) infection, and that mainly occurs in the oral cavity. Although some clinical features can lead to a diagnosis, PBL in an extraoral site is difficult to suspect clinically in a patient who is HIV negative. The small intestine as a site of PBL has also been described very rarely. We herein present a rare case of PBL of the small intestine in an 85-year-old HIV- and EBV-negative male.

Primary malignant lymphoma of the right atrium resulting in superior vena caval syndrome in an HIV-positive patient: depiction at multislice computed tomography and magnetic resonance imaging.

An HIV-positive 32-year-old male presenting with superior vena cava syndrome underwent multislice computed tomography (MSCT) and magnetic resonance imaging (MRI), which showed a large tumor in the right atrium, which extended to the superior vena cava. Pathologic examination revealed that the mass was consistent with B cell-type malignant lymphoma. The tumor size markedly decreased after the initiation of chemotherapy and patient recovery has been uneventful for 1 year.