TY - CHAP M1 - Book, Section TI - Alveolar Hemorrhage Syndromes A1 - Lynch, Joseph P. A1 - Fishbein, Michael C. A1 - Wang, Tisha A2 - Grippi, Michael A. A2 - Elias, Jack A. A2 - Fishman, Jay A. A2 - Kotloff, Robert M. A2 - Pack, Allan I. A2 - Senior, Robert M. A2 - Siegel, Mark D. Y1 - 2015 N1 - T2 - Fishman's Pulmonary Diseases and Disorders, 5e AB - Diffuse alveolar hemorrhage (DAH) is a potentially catastrophic complication of myriad immune and nonimmune disorders.1–3 Clinical features are broad, but hemoptysis, infiltrates on chest radiographs, hypoxemia, and progressive respiratory insufficiency are common to diverse etiologies.2 Nonimmune causes of alveolar hemorrhage include endobronchial tumors, arteriovenous malformations or aneurysms, ulcerative tracheobronchitis, hemorrhagic pneumonia, bronchiectasis, congestive heart failure, uremia, thrombocytopenia or coagulopathy, pulmonary venoocclusive disease, infections, and massive pulmonary embolism.4,5 These nonimmune causes need to be excluded in patients with severe alveolar hemorrhage. Depending upon the clinical scenario, coagulation profiles and ancillary tests (e.g., echocardiogram, chest computed tomographic [CT] pulmonary angiography, fiberoptic bronchoscopy) may be required to establish a specific diagnosis. In addition, other causes of diffuse parenchymal infiltrates (but without severe alveolar hemorrhage) share features in common with DAH syndromes (e.g., cryptogenic organizing pneumonia, hypersensitivity pneumonia, pulmonary alveolar proteinosis, and diverse interstitial or alveolar lung disorders). A discussion of these disorders is beyond the scope of this chapter, which focuses primarily on immune-mediated causes of DAH. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/16 UR - accessmedicine.mhmedical.com/content.aspx?aid=1122362011 ER -