Most common cause of pleural effusion in HIV patients -

Pleural effusions are seen in 70% of cases of pulmonary Kaposi sarcoma , a fact that is often helpful in the differential diagnosis. Primary effusion lymphoma (PEL), also referred to as body cavity lymphoma, presents with lymphomatous pleural, pericardial, and/ or peritoneal effusions in the absence of discrete nodal or extranodal masses. (Harrison's Principles of internal medicine, 20 th edition, page 1566)