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Paracoccidioidomycosis is a common deep mycosis in South America. It is caused by the dimorphic fungus Paracoccidioides brasiliensis. We report a case of a 47-year-old Brazilian man with oral lesions due to paracoccidioidomycosis, which was diagnosed by exfoliative cytology without any special staining. We highlight this diagnostic tool as a simple, low-cost, painless, non-invasive and fast method for the diagnosis of paracoccidioidomycosis.