Abstract
Bronchoalveolar lavage (BAL) explores large areas of the alveolar compartment. After the introduction as a research tool, BAL has been appreciated extensively for clinical applications in the field of opportunistic infections and diffuse interstitial lung diseases (DILDs). It is considered as a safe, minimally invasive procedure. In selected cases, BAL has become an accepted technique for establishing or ruling out a diagnosis with only a low risk of incorrect diagnosis. BAL fluid (BALF) analysis can be very helpful in the differential diagnosis. A grouping of features, an elevated total cell count, predominantly lymphocytes, together with a nearly normal percentage of eosinophils and polymorphonuclear neutrophils and the absence of plasma cells, distinguishes the most likely diagnosis of sarcoidosis from the most common DILD, extrinsic allergic alveolitis (EAA), nonspecific interstitial pneumonia, and idiopathic pulmonary fibrosis (IPF). Knowledge about disease presentation or activity at the time the BAL is performed as well as the smoking status and possible history of occupational and/or environmental exposures is crucial for adequate interpretation of individual BALF analysis results. In contrast, the usefulness of BAL in the management and prediction of the prognosis of a certain disorder is, so far, rather controversial.
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Drent, M., Linssen, C.F.M. (2012). Bronchoalveolar Lavage. In: Baughman, R., du Bois, R. (eds) Diffuse Lung Disease. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-9771-5_3
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DOI: https://doi.org/10.1007/978-1-4419-9771-5_3
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