We report a 98-year-old patient with primary age-related EBV-associated effusion-based lymphoma (aEBV-EBL) in the setting of persistent transudative pleural effusion. He was treated with rituximab and thoracentesis achieving complete remission. We suggest that aEBV-EBL is a subtype of EBVpositive HHV8-negative EBL, which is part of the EBVpositive DLBCL-NOS spectrum.Primary human herpesvirus 8-negative effusion-based lymphoma (HHV8-negative EBL) is a distinct category of non-Hodgkin lymphoma which manifests as a serous effusion without a distinct tumor mass. The hallmark of a HHV8-negative EBL diagnosis is negativity for HHV8 infection, thereby distinguishing itself from primary effusion lymphoma (PEL) which requires the presence of HHV8 infection. 1 HHV8-negative EBL has been found in association with hepatitis C virus (HCV) infection, fluid overload, liver cirrhosis, renal dysfunction, cardiac arrhythmias, myocardial infarction, and heart failure. [2][3][4][5] Epstein-Barr virus (EBV) infection has been reported in 13% of HHV8-negative EBL cases. 3 EBV-positive and HHV8-negative EBL have been reported in patients with liver disease, HIV, lymphocytopenia, common variable immunodeficiency, solid organ transplant, and renal disease. 2,[6][7][8][9][10] EBV-positive DLBCL-NOS is a well-defined entity in the World Health Organization (WHO) classification of B-cell lymphomas. EBV-positive and HHV8-negative EBL can be defined as EBV-positive DLBCL-NOS primarily presenting as EBL. Age-related EBV-associated DLBCL, another wellknown entity seen in elderly patients, is also recognized as part of the spectrum of EBV-positive DLBCL-NOS. 11,12 This entity is known to follow an aggressive clinical course when compared against EBV-negative DLBCL. 13,14 Herein, we report an extremely rare case of primary age-related EBV-associated effusion-based lymphoma in a 98-year-old man who achieved complete remission following rituximab monotherapy and thoracentesis. We further discuss