[Features of aspergillosis in ENT. Histopathology of fungal infections of the paranasal sinuses caused by Aspergillus fumigatus (author's transl)].

Fungal diseases of nasal and paranasal sinuses caused by Aspergillus fumigatus are not rare. Second to diagnosis in defined culture medium only, histological diagnosis can easily be achieved in Haematoxilin-Eosin-, and PAS-stained samples of fungal masses in the sinuses. Specific histological features of Aspergillus fumigatus are described, especially the onion-skin like structure of the fungus balls, and their development discussed. Out of seventy cases only one showed invasion of the mucosa of the sinus, the others all showing extramucous position of the fungus.