FIG. 1. This is a low power photomicrograph of an H&E stained section of lung. The fungus ball or aspergilloma on the left is composed almost entirely of matted fungal hyphae.
FIG. 2. This is a Gomori methenamine silver nitrate stained section of the aspergilloma shown above.
FIG. 3. This is a cross-section of lung containing a small aspergilloma (arrow). Histologic examination showed the features seen in figures 1 and 2.