Aspiration cytology and immunohistochemistry of an orbital aspergilloma.

The results of fine-needle aspiration (FNA) cytology combined with immunohistochemical staining of an orbital aspergilloma are presented. The cytologic findings included a tangled mass of hyphal elements and acute inflammation consistent with fungal disease. The slides were stained by the peroxidase-antiperoxidase method for Aspergillus sp. Positive staining confirmed the diagnosis of an orbital aspergilloma, and appropriate therapy was started.