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July 21, 2008

Verrucous Nodular Eruption on the Head—Diagnosis

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Arch Dermatol. 2008;144(7):933-938. doi:10.1001/archderm.144.7.934-b

Histopathologic examination showed pseudoepitheliomatous hyperplasia of the epidermis and multiple granulomas in the dermis, with a surrounding mixed cell infiltrate. Thick-walled spherules with endospore formation and several of the multinucleate giant cells were present within the granulomas. Complement fixation tests were strongly positive for fungal antibodies, with a Coccidioides titer of 1:16. There was no evidence of lung involvement on chest x-ray films. Fungal cultures of the skin yielded Coccidioides immitis. After the biopsy results were received, fluconazole therapy (400 mg/d) was initiated, resulting in flattening of the nodules over a period of 5 months.

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