RT Book, Section A1 Papadakis, Maxine A. A1 McPhee, Stephen J. A1 Bernstein, Jennifer SR Print(0) ID 1159909687 T1 Effusions, Malignant T2 Quick Medical Diagnosis & Treatment 2019 YR 2019 FD 2019 PB McGraw-Hill Education PP New York, NY SN QMDTxix LK accessmedicine.mhmedical.com/content.aspx?aid=1159909687 RD 2021/01/16 AB Half of undiagnosed effusions in patients not known to have cancer are malignantMalignant effusions occur in pleural, pericardial, and peritoneal spacesCaused by direct neoplastic involvement of serous surface or obstruction of lymphatic drainage