A Case of Allergic Fungal Sinusitis Caused by Bipolaris spicifera
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概要
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We describe a case of allergic fungal sinusitis (AFS) caused by Bipolaris spicifera, the first case reported in Japan. A 70-year-old man was admitted to our hospital because of diplopia following bilateral nasal obstruction and discharge. Radiological studies using computed tomographic scan showed a large soft tissue mass occupying the right frontal, bilateral ethmoid and sphenoid sinuses. He underwent drainage surgery and histopathological examination of the contents of the paranasal sinuses revealed scattered fungal hyphae within "allergic mucin". By cytological examination, these hyphae showed septation at irregular intervals, and were swollen to various sizes. Microbiological studies identified the fungus as Bipolaris spicifera. The presence of allergic mucin and scattered fungal hyphae were very important findings in making a diagnosis of AFS histopathologically, so squash cytology of the contents of the paranasal sinuses was quite useful to observe fungal elements and identify the strain in this case.
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