Microscopic Description -- Lung Abscess


The right main bronchus shows an area of severe diffuse necrosis, acute and chronic inflammatory infiltrates with neutrophils, lymphocytes and macrophages, and fibrosis (Image 03). The right lung shows extensive, diffuse areas of necrosis. There is an extensive, diffuse inflammatory cell infiltrate with neutrophils, macrophages and lymphocytes. There are also areas of hemorrhage and hemosiderin pigment deposition (Images 04, 05, 06 and 07). There is focal fibrosis and there are focal hyaline deposits within the alveoli as well as diffuse alveolar edema (Image 08 and 09). A Grocott stain shows the typical hyphae which are broad, thin walled and pleomorphic, with irregular, nonparallel contours which are folded and collapsed (Images 10 and 11).



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