RT Book, Section A1 Thompson, Jeffrey C. A1 Ma, Kevin C. A2 Grippi, Michael A. A2 Antin-Ozerkis, Danielle E. A2 Dela Cruz, Charles S. A2 Kotloff, Robert M. A2 Kotton, Camille Nelson A2 Pack, Allan I. SR Print(0) ID 1195008714 T1 Malignant Pleural Effusions T2 Fishman’s Pulmonary Diseases and Disorders, 6e YR 2023 FD 2023 PB McGraw-Hill Education PP New York, NY SN 9781260473988 LK accessmedicine.mhmedical.com/content.aspx?aid=1195008714 RD 2024/04/19 AB A malignant pleural effusion is defined by the accumulation of fluid in the presence of malignant cells or tumor tissue in the pleural space. Malignant pleural effusions are common, affecting approximately 15% of patients with malignancies, and account for more than 125,000 hospitalizations in the United States annually, with estimated healthcare costs of greater than $5 billion per year.1,2 The incidence of malignant pleural effusions is expected to rise as a result of the increasing global cancer prevalence and development of more effective systemic therapies.3 The presence of a malignant pleural effusion is a hallmark of advanced-stage disease and denotes a poor overall prognosis, with a median survival ranging between 3 and 12 months depending on the primary tumor type.4 Although some patients may be asymptomatic, the majority develop dyspnea at rest with associated reduced quality of life.5 Despite advancements in understanding the pathophysiology of malignant pleural effusions and remarkable progress in cancer treatments over the last decade, management strategies for malignant pleural effusions remain palliative, with the goal of relieving patient symptoms and minimizing the need for repeat invasive procedures.