Human herpes virus 8-negative effusion-based lymphoma in a patient with persistent serous effusions.

Diffuse large B-cell lymphoma is the most common histologic diagnosis among the aggressive lymphomas, accounting for 30% of all lymphomas. Human herpes virus 8-negative effusion-based lymphoma (HHV8-negative EBL) is a rare form of lymphoma, under recognized and still not well characterized in the literature. In contrast to primary effusion lymphoma (PEL), HHV8-negative EBL is characterized by malignant effusion in essentially serous body cavity with no detectable contiguous tumor masses and is no associated with human immunodeficiency virus and HHV8 infections. The presence of comorbid medical conditions can hide this type of lymphoma and made diagnosis more challenging. Here, we describe a rare case of an 82-year-old male suffering from peritoneal and pleural effusion and Hepatitis B virus related cirrhosis diagnosed with HHV8-negative EBL.