Fig. 2

Imaging study of the chest and histopathological images of resected specimens. a Computed tomography of the chest reveals a cavitary nodule with thin wall and pleural indentations in the right upper lobe. b The bronchioles surrounding the areas of inflammation and fibrosis are seen in hematoxylin and eosin stained section through a magnifying glass. c The necrotizing granuloma (arrows) destroying and invading the wall of bronchiole is seen in hematoxylin and eosin stained section at low magnification. d A fungus ball (arrow) is seen in the cavity at the other hematoxylin and eosin stained section through a magnifying glass. e A fungus ball (arrow) is shown at low magnification view in hematoxylin and eosin stained section. f Y-shaped filamentous fungi in the fungus ball are seen in hematoxylin and eosin stained section at higher magnification. g The organisms are well outlined with Grocott’s methenamine silver stain. The dichotomous branching hyphae and scatter septations can be observed at higher magnification