Domestic crossbred cat with disseminated aspergillosis. KOH preparation of material obtained from thoracotomy of a 3 year old domestic crossbred cat with invasive Aspergillus fumigatus infection. The cat had marked enlargement of the hilar lymph nodes that resulted in a partial tracheal obstruction. This preparation was made from portions of the hilar lymph node resected at thoracotomy. Magnification x 132.