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Perls' Prussian Blue Stains of Lung Tissue, Bronchoalveolar Lavage, and Sputum

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Publisher Begell House
Date 2021 Feb 27
PMID 33639069
Citations 10
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Abstract

Perls' Prussian blue (PPB) stain recognizes Fe3+ associated with hemosiderin. The employment of this stain in clinical medicine and research has been extensive and novel applications continue to evolve. Ferruginous bodies are intracellular structures in lung tissue, bronchoalveolar lavage (BAL), and sputum that stain with PPB. Inhaled, insoluble, biopersistent particles and fibers are phagocytosed by lung macrophages and thought to be coated, either partially or completely, with an iron-containing protein at the interface forming a ferruginous body. These structures can be categorized as ferruginous bodies having either an inorganic or a carbonaceous core (e.g., asbestos and byssinotic bodies, respectively). In lung tissue, BAL, and sputum, the only cells that stain with PPB are macrophages. These are described as iron- and hemosiderin-laden macrophages and called either siderophages or sideromacrophages. Siderophages can be observed in the lung tissue, BAL, and sputum after various exposures and can also be associated with many different pulmonary and extrapulmonary diseases.

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